M4A1(76)s manufactured by Pressed Steel Car
Most
of the information on this page is courtesy of Joe DeMarco. Note: some of the
information on
this page was compiled using a
technique informally referred to as "counting heads."
It is based on the ongoing study of period documents and
photographs, as well as surviving Shermans. Due to the
limited nature of available reference
sources, some of the information presented here must be
considered as "educated guesswork."
Pressed Steel Car was the only manufacturer of the
M4A1(76), and produced a total of 3426 units from January 1944 through July
1945.
Production
Order T-4166/2
: 1130 tanks with VVSS manufactured:
Serial Number 37900 / USA 3070497 through S/N 39029 /
USA 3071626
Production
Order T-4344/1
: 831 tanks with VVSS manufactured: Serial Number 51850 / USA
3084447 through S/N 52680 /
USA 3085277
Production
Order T-14608/1
: 1327 tanks with VVSS or HVSS manufactured: Serial Number 67701 / USA
30125680 through S/N 69027 /
USA 30127006
Production
Order T-14608/2
: 113 tanks with HVSS manufactured: Serial Number 71654 / USA
30135486 through S/N 71766 /
USA 30135598
Production
Order T-14608/3
: 25 tanks with HVSS manufactured: Serial Number 73836 / USA
30140226 through S/N 73860 /
USA 30140250
Introduction
- First trials
In August 1942, a few months
after Shermans began rolling off the assembly lines, the Ordnance
Department
began testing the feasibility of mounting a 76 mm gun in the standard
D50878
turret (below left). The intention was to produce 1000 76mm armed
Medium Tanks
by the end of the year. Ultimately, the project was cancelled because
it was
determined that the small turret was unsuitable. In the meantime,
development
work was initiated on new Medium Tank designs known collectively as the
T20
series. The T23, which mounted a 76mm gun in a larger turret, was never
standardized due to various technical problems (below right). However,
since
the 69 inch diameter turret ring was the same as the Sherman's, the
T23's 76mm
turret was easily adapted for use on the late 1943 revision of the M4
series.
Click on
the picture for larger size
____________________________________________________________
First
"large hatch" M4A1s

The small size of the drivers'
hatches of the original Sherman design was reported to have caused a number
of crew injuries, particularly during exits in emergency situations. The hatches
were enlarged as part of the "second generation" redesign program. The first
M4A1s with large hatches were equipped with 75mm guns, and were manufactured by
Pressed Steel Car in December 1943. They retained the "dry stowage" of the
original design, where the 75mm ammunition bins were mounted in vulnerable
positions on the sponsons. In the right side photo above, we've pointed out what
we informally label "cast in appliqué." These "bumps" were incorporated
into the hull casting in the area of the sponson mounted ammo bins, thus
eliminating the need for welding on the one inch armor plates that were mandated
to be factory installed or retrofitted on dry stowage Shermans starting in the
Summer of 1943. It is thought that only Montreal Locomotive and Pressed Steel
Car produced M4A1(75)s with "cast in appliqué" hulls. They appear on the last 75
or so Grizzlies (all small hatch), as well as the last 500 or so PSC built
M4A1(75)s (approximately 400 small hatch units and 100 large hatch). Many of the
large hatch M4A1(75)s were converted to Duplex Drive Swimming Tanks, and a
couple of these DDs are on display in France and Great Britain. The above photos
(courtesy of Alf Adams) show the DD that was recovered from the sea, and serves
as a monument at Slapton Sands in the UK.
Here
we see an example of a large hatch M4A1(75) of B Co. 774th TB, bogged
down in a stream in southern Germany, and photographed by a recovery
crew shortly before or after VE Day. Although not immediately obvious,
the front fenders (1) on this tank and certain other fittings
and weld scars indicate that it had once been a DD. Note the absence of
the typical M4/M4A1 air cleaners (asterisk). On DD conversions, the air
cleaners were moved into the engine compartment because they interfered
with the operation of the DD's propellers. Indeed, the rear engine deck
plate is ajar, and the right side air cleaner is just visible (inset).
This unit can be seen with a high bustle turret with loader's hatch, and
it is thought that all of the large hatch M4A1(75)s would have been
built with such turrets. The .50 cal Machine Gun stowage fittings on the
turret bustle (2) would have been retrofitted, since this modification
was not available until mid 1944.
Early M4A1s with 76mm
main gun
The
M4A1 with 76mm main gun entered production in January 1944. As part of
the "second generation" design, these tanks had "wet stowage" where the
ammunition bins were relocated from the sponsons to better protected
positions on the floor of the hull. However, on the sides of the
earliest 76mm hulls, one can see what appears to be traces of the "cast
in appliqué" of the dry stowage, large hatch M4A1(75) hulls as described
above. The roughness on the hull sides could indicate that the cast in
"bumps" were simply removed from the 75mm E8550 hull mold to come up
with the E8595 (76mm, wet stowage) casting. The left side photo shows an
early M4A1(76) (S/N 37914 / USA 3070511) in "as built" condition. For
future reference, note that this unit, which would have been the 15th
produced by PSC, can be seen with the "final" type of E8543 differential
housing with metal strip steps. The right side photo (courtesy of
Michael Lembo) shows the oldest known surviving M4A1(76) (the fourth
production unit, S/N 37903), on display at an army base at Grafenwöhr,
Germany. This tank has a number of upgraded features, as it was rebuilt
after the war. Both tanks have the early "ventless" D82081 turrets,
described below.
An interesting anomaly that has been observed exclusively
on the D82081 turrets used on the earliest M4A1(76)s is the absence of the rear
ventilator. Unlike the Sherman, the T23 Medium Tank was designed with a powerful
hull ventilation system that did not require a separate turret ventilator.
Eventually, the specifications for adapting the T23 turret to the Sherman series
called for the addition of a ventilator. However, the Army was anxious to get
the 76mm Sherman into production, and Pressed Steel Car was "the only tank
facility which would undertake the new type vehicles and promise delivery for a
deadline date in January of 160 of these vehicles to meet urgent requirements of
the using forces." Thus, in the rush to production, the first M4A1(76)s were
manufactured before the ventilator specifications were finalized. The Union
Steel Corp. was the main turret supplier to Pressed Steel Car. Many US turrets
have their serial numbers cast in fairly large on one or both sides, making it
possible to "count heads" on this omission. The ventilator appears to have been
added to their turrets at around number 450. In the above photos, one can see
how the locations of the various MG stowage fittings differed on the ventless
turret compared with the vented.
Another glitch exclusive to
the M4A1(76) was also likely related to the rush to production. It was remarked
in internal memos that, in the first few months of production, the split
hatches didn't open past the vertical position, thereby interfering with the
operation of the anti-aircraft machine gun, and making for an uncomfortable
traveling position for the loader. The hatches had been redesigned to open
outward to 45 degrees, and it was suggested that a field repair order be
issued. The above photos show two views of USA 3070707, a 32nd Armored
Regiment, 3rd Armored Division Sherman knocked out near Bergerhausen, Germany,
circa March 1, 1945. This tank was the 211th M4A1(76) made, and would have been
accepted in February 1944. Most likely, it was one of the "UK
orphans" described below. In any case, aside from the fact that the
crew has reversed the “factory” position of the hatches, this turret
reflects the appearance of the early Union Steel - vertical loader's
hatches, no ventilator, and "unthreaded" M1A1
gun.
The photo on the left
shows the initial, problematic configuration of the loader's split hatch as
mounted on a ventless Union Steel turret with serial number 271. Assuming that
this hatch is original to turret 271, we would note that this is the highest US
turret serial number we have seen with the original loader's hatch. Our friend,
Michael Lembo, was able to demonstrate that the hatches would not open past the
vertical position. Although this tank had been remanufactured in the early
1950s, the hatch and missing ventilator issues were not addressed. The photo on
the right shows the revised loader's split hatch. The positive hatch lock mechanisms (1) that can be seen, are the same type
as had been introduced on Shermans starting in the Spring of 1943. It is
thought that PSC began the transition to the revised loader's split hatch in
March, 1944 at around US turret 260, and that Chrysler used them from the
beginning of M4A3(76) production in March, 1944.

An Ordnance Department document states that "All Medium
Tanks M4 series (76mm gun) since first 385 produced have been equipped with
threaded gun tubes." This suggests that the unthreaded M1A1 guns as seen on the
early M4A1(76)s, would have been replaced in production with threaded M1A1C guns
sometime in March, 1944. Chrysler began M4A3(76) production in March, and a
small number of their first tanks have been noted to have had unthreaded guns as
well. The above photos show two views of "Gila Monster," Serial Number 37936,
USA 3070533, the 37th M4A1(76) made. It was used in various tests at APG,
including May / June 1944 trials of the muzzle brake installation. Some items of
interest include the "uncovered" vent between the drivers' hatches (1), the
provision for an antenna on the left front of the turret (2), the blanked off
fuel filler hole (3), the "vertical" loader's hatches (4), and the early version
of the sharp nosed differential housing with cast in steps (5).
The M4A1(76) model added a new armored
filler cover to the rear engine deck plate. This was for the "engine
oil tank." The small curved tag seen in the left photo appears to be
the same size and shape as the "LUBRICATING OIL" labels used
on the M4A2 diesel model. Note how the cover is surrounded by a
cast bullet splash. The standard tool stowage, blanket roll rack and
spare track holders can be seen in the above illustration from the
Technical Manual. This particular M4A1(76) looks to have US turret 359
(inset). While it "still" lacks the ventilator, it does have the
revised loader's hatch with positive hatch lock mechanisms.
Radial engine Shermans had
four main fuel tanks, and on the M4 and M4A1(75)s, each had its own
filler point. As part of the second generation redesign, M4A1(76)s were
plumbed in such a way that only a single filler point was required for
the two fuel tanks located on either side of the hull. The photo on the
left shows the original four point configuration, as seen on one of the
last M4A1(75)s made, a large hatch model. A few early production
M4A1(76)s have been seen to have the configuration shown in the middle
photo, where excess older parts were used, and the unnecessary holes
were simply blanked off. The right side photo shows the standard
M4A1(76) configuration. The small tags seen near the armored filler
covers read "GASOLINE." The addition of the "LUBRICATING
OIL" filler point prompted the use of "GASOLINE" labels at the
other 3 filler points on the M4A1(76) and M4(105).
Early M4A1(76)s had straight return roller arms (1), such as can be
seen on USA 3070551, a January 1944 production tank that served with the 3rd
Armored Division, and was photographed in Chenee, Belgium on September 7, 1944.
While Chrysler and Fisher Body had completed the transition to the later
upturned return roller arms (inset) by the beginning of 1944, Pressed Steel Car
does not appear have completely replaced the earlier straight arms until the
Spring. The periscope guards that can be seen were a standard feature of all
second generation Shermans.
A
few of the earliest M4A1(76)s were built with the first version of the
E8543 differential cover that featured cast-in steps (circled). Period
documents mention that the cast-in steps interfered with the crew's
ability to work the quick release towing shackles. Consequently, the
differential castings were altered to eliminate the cast-in steps, and
metal strip steps were welded on instead. It is thought that PSC's
supply of diffs with cast-in steps would have been exhausted after the
first few months of production. Our example shows the M4A1(76) on
display in La-Roche-en-Ardenne, Belgium. The serial number is unknown,
but the hull number is 3904, suggesting it was built in February 1944.
The tank was restored somewhat, so it can't be assumed to have all of
its original components. However, it shows no evidence of having had the
usual postwar upgrades, and the ventless Union Steel turret with Serial
Number 206, the unthreaded 76mm gun, and the early E8543 differential
are certainly appropriate to a February 1944 production unit. We
strongly suspect that this tank was a WW II battle casualty. Should any
readers have any information about its history, please contact us.

In early 1944, a special task force of 156 of the first
M4A1(76)s was sent to the UK for familiarization. They evoked little interest
from US armored commanders whose troopers had been training for the Invasion for
many months with M4 & M4A1(75)s. Confrontations with heavy German armor in
Normandy aroused interest in the "orphan" M4A1(76)s sitting idle in England, and
General Bradley ordered that they be shipped to France to take part in First
Army's upcoming Operation Cobra. 120 were evenly distributed to the 2nd and 3rd
Armored Divisions, and they made their combat debut in late July 1944. On the
left, a tank of the 67th Armored Regiment, 2nd Armored Division "enters the
village of St. Sever Calvados, France. 3 Aug 44." Note the cast in steps on the
diff. "Duke," USA 3070582 of the 66th Armored Regiment, 2nd AD (right), was one
of the last M4A1(76)s accepted in January 1944. It was photographed in Coutance,
France during Operation Cobra. The rubber chevron tracks are the primary type
seen in period photos of the "orphan" M4A1(76)s. For future reference, note that
Duke has an "unframed" exhaust deflector, and lacks support gussets in the area
of the air cleaners.
The photos above show what appears to be E-3 of
the 2nd Battalion, 32nd Armored Regiment, 3rd Armored Division advancing down
Venloerstraße in Cologne on March 6, 1945.
Many
of the AFVs of the 32nd AR are seen with the USA Registration Number
painted on the front and rear. In the still photo on the left, the
number has been censored somewhat, but it appears
intact in the motion picture frame on the right. USA 3070536 would have
been a January, 1944 production unit, and the inset shows a very low Union Steel turret Serial Number of 45.
It is highly
likely that this was one of the "orphan" M4A1(76)s shipped over from the
UK before the start of Operation Cobra in late July, 1944.
The photo above shows the
M4A1(76) with ventless turret on display in Nehou, France. We suspect that this
was one of the 421 M4A1(76)VVSS Shermans remanufactured and supplied to France
as Military Assistance in the early 1950s. The upper right section of the remanufacturer's
dataplate is shown in the inset, and it can be seen that this tank is
Serial Number 37939,
which is an exact mathematical match to USA 3070536 shown in the previous
caption. Thus, it would seem that this tank survived WW II, and was repatriated
back to the US. This Sherman obviously received a number of upgrades during
remanufacture, such as a new 76mm gun with muzzle brake and the canvas mantlet
cover fittings, but the Union Steel turret Serial Number can be seen as 45
(inset), the same as noted, and in the same location, as in the period photo. The
tank currently carries tactical markings in honor of the 35th Tank Battalion,
4th Armored Division. Perhaps at some point it could be remarked to reflect its
WW II service with the 32 Armored Regiment, 3rd AD?
The
Ford V8 engine was considered superior to the Continental Radial of the
M4/M4A1 series, and it was the policy of the US Army to attempt to
equip its fighting forces with as many M4A3s as possible. Consequently,
the US did not employ large numbers of M4A1(76)s. Indeed, we can find no
evidence that the US received any additional units in 1944, and no
evidence of combat use outside of the European Theater. The British did
not "require" any 76mm Shermans, as they considered the HE round to be
inferior to the 75mm's. However, they agreed to accept 1330 M4A1(76)s in
1944, since there weren't enough 75mm Shermans available to meet their
Lend Lease requirements for the year. This was almost the entire
production of M4A1(76)s up to October 1944. Those allocated to the
Mediterranean Theater of Operations were used by British and South
African armored units. In the European Theater, the Polish 1st Armoured
Division appears to have been the only unit to have utilized the
"Sherman Mk IIA" (British nomenclature for M4A1(76)VVSS ). Tank
Situation Reports state that they had 51 units at the end of
December 1944. By the end of the War in Europe, the Poles are listed as
having 181 M4A1/76s along with 40 “17 pdr” (Firefly Shermans). An
additional 97 M4A1/76s are reported in 21st Army Group Depots in
June 1945. Above shows a Sherman IIA of the Polish 10th Armoured Cavalry
Brigade, KO'd in the Netherlands in late 1944.
On
December 26, 1944, the US 12th Army Group sent an urgent communication
to the British 21st Army Group “requesting immediate release of 500
tanks” to provide replacements for losses suffered during the Battle of
the Bulge. Commonwealth Vehicle Parks were scoured, and in the end,
maintenance teams prepared and shipped 351 Shermans by the first week of
January 1945. The most modern model included in this emergency transfer
was the M4A1(76). As mentioned, the Brits did not really want these due
to their lack of an acceptable HE round, but even so, only provided 87
such units, with the rest being older 75mm Shermans, including M4/M4A1s,
M4A2s and M4A4s. The M4A1(76)s were doled out to the various Armored
Divisions and Tank Battalions of the First US Army. The 743rd Tank
Battalion was allocated 5, and it is thought that the unit shown above
was one of them. A number of these transfers have been noted to have
inappropriate 6 digit “Registration Numbers,” some with “X” prefixes
such as “X 309084” seen here. We believe that these were British War
Department Numbers specifically assigned to the Shermans transferred. At
present, we have recorded about 20 such numbers ranging from 309012
through 309237. This
Signal Corps photo is dated 6 January 1945, in Ster, Belgium and
identifies the unit as Company C, 743rd Tank Battalion. Part
of the caption reads, “Tank crewmen knock off connectors on tank track
prior to putting on new duck bills that will enable vehicle to travel
over muddy ground.” Note
the welded spoke with "small holes" road wheels (1) introduced in
production at PSC in the Fall of 1944. We would guess that this unit was
never issued to a Commonwealth unit before the transfer and was one of
the 150 M4A1(76)s allocated as Lend Lease to the UK in September 1944.
Much greater use of the
Sherman IIA was made by the 15th Army Group in Italy than by the 21st Army
Group in Northwest Europe. The first issues appear to have occurred in
September, 1944 when the British 1st Armoured Division was reported with 28
units, and the British 6AD with 2. The 1st AD was broken up a month later, due
to an inability to replace casualties; however, its 2nd Armoured Brigade
survived as an independent entity. At the end of 1944, the 2nd AB was reported
with 116 Sherman IIAs on strength, while the 6th AD reported 42, the 7th
Armoured Brigade reported 61, and the 6th South African AD reported 134. Thus,
total unit holdings were 353 Sherman IIAs with an additional 65 in “Tank
Replacement Group.” By the end of the War, total unit holdings had decreased to
329 units, while the “Tank Replacement Group” pool had more than doubled to 144
plus 11 in “Training.” The photo above is captioned “A Sherman tank of 2nd
Armoured Brigade crossing the River Rabbi at San Martino, 9 November 1944.” The
2nd Armoured Brigade consisted of The Queen’s Bays, 9th Lancers and 10th
Hussars, and this Sherman IIA has been identified as belonging to B Squadron, The Queen's Bays (aka 2nd Dragoon Guards). It
features the revised loader's split hatch, introduced at PSC in March, 1944. Courtesy
of Imperial War Museum, NA 20043.

The 6th South African Armoured
Division appears to have been the largest user of the Sherman IIA in the
Mediterranean Theater. Its regiments began replacing some of their 75mm
Shermans in November, 1944, and a 15th Army Group AFV Situation Report states that,
“as at 30 December, 1944,” they had 134 M4A1(76)s. By the end of the War, this
number had decreased by 6, due to losses and “wastage” during the final
offensive. The photo above, dated April 20, 1945, shows elements of the Special
Service Battalion of the 6th South African AD massing in preparation for the
attack on Bologna, Italy. Despite the late date, all of the M4A1(76)s that can
be seen have the earlier split loader's hatches. The tank in the center
foreground even has a ventless turret. Note that the loader's hatches are open
to the standard, 45 degree position. The commander's cupolas are not in the
standard or "as built" configuration. It would appear that the unit
reoriented the cupolas so that the hatches opened further to the rear. Some
Firefly (17 pounder) Shermans can be seen on the far right. The Division was
attached to the US 5th Army for the Spring 1945 Offensive, and according to
their records, each of the 3 Squadrons of the SSB had 13 M4A1(76), 3 M4A4 based
Fireflies and 3 M4(105)s.
The final M4A1(76) allocations
to the British were for 150 units a month from August through October, 1944. We
estimate that most of these would have been equipped with oval loader's
hatches, and perhaps a few from the October production would have included
muzzle brakes. However, we have not come across a "combat shot" of
any of these in Commonwealth service. These tanks would have arrived in Europe
in late 1944 / early 1945, at which point they could not be absorbed, and thus
were no longer needed by the shrinking Commonwealth forces. The above shows a nearly as built M4A1(76) with oval hatch on display
at the School of Armour in Bloemfontein. On January 3, 1947 the South Africans obtained a “property
consent to retransfer” from the US Lend Lease Administrator. As a consequence,
it was agreed that, subject to availability, 67 Sherman M4A1(76)s, 15 M4(105)s,
15 M4 based Fireflies, and 1 M32B1 ARV would be transferred from British Military
Holdings in Italy to the South African Forces. It is thought that all of these
were shipped to South Africa within the year. At any rate, thirty-two M4A1(76)s
are listed in an inventory of the 1st Special Service Battalion, Potchefstroom,
S.A., March 31, 1948. Most likely, the South Africans would have chosen to
purchase unused or low mileage tanks, and the example shown is reported as in
running condition. This tank and the other surviving S.A. Shermans, could still
have their original dataplates, so if any readers are in the position to
examine any of them, we would greatly appreciate a report.
An oval loader's hatch had
been added to 75mm turrets in late 1943. In an effort to simplify the original
D82081 turret design (left side photo), the Ordnance Department adopted this
concept, and replaced the original split hatch with an oval hatch. The new
turret casting carries part number 7054366 (right side photo). The split hatch
had a machine gun pintle and loader’s periscope built in, so with this change,
an MG pintle (1) and loader’s periscope (2) were added to the roof of the
turret. Ordnance documents state that all M4A1(76)s built after August 1, 1944
received the new model of turret. The loader's hatch was the same size and
shape as the "large" drivers' hatches, that is approximately 24
inches long and 19 inches wide. In comparison, the oval hatches of the 75 and
105mm turrets were about 21 inches long and 16 inches wide. Note that the
7054366 turret was not machined out for the left front antenna, although the
casting retained the tell tale "bump out" to the end of production.
We would note that, while this "bump out" is present on some other
companies' 76mm turrets, it is most prominent on Union Steel castings.
Pressed Steel Car had produced
776 M4A1(76)s by the end of May, 1944. If we assume a loose chronology to the
turrets, then we might speculate that Union Steel turrets with 8xx serial
numbers would have started to appear in June. The D82081 turrets shown above
are 881 on the left and 873 on the right. The left front antenna is NOT
machined out on these examples. On Union Steel turret 831, shown in the
previous caption, the antenna is machined out. This gives us a fairly good idea
of the "eliminate the front antenna" transition point. While we don't
assume that surviving Shermans have their original turrets, the tank serial or
build sequence numbers of all 3 of these M4A1(76)s indicate that they were
accepted in June, 1944.
As mentioned previously, most
Union Steel turrets have their serial numbers cast in fairly large on one or
both sides. A "1" or "2" is seen above or below the serial
number. We believe this indicates that Union Steel 76mm turrets were cast using
either mold 1 or mold 2. From "counting heads," mold 2 appears to
have been changed from a D82081 (split hatch) casting to a 7054366 (oval hatch)
casting at around serial number 1000, whereas mold 1 was changed at around
serial number 1350. Thus, one might see an earlier split hatch casting with a
higher serial number than a later oval loader's hatch casting. For instance,
the photo on the left shows a mold 1 D82081 turret with serial number 1310,
while the one on the right is a mold 2 7054366 turret with serial number 1043.
(Right side photo courtesy of Tom Gannon.)

Muzzle
brakes began to enter the production line in October 1944, and we
estimate that PSC completed the transition to them by November. Thus
about half of the entire output of the M4A1(76) would have had these
factory installed. Even so, they are rarely seen in WW II combat photos
of Shermans of any type due to their late date of introduction. The
first M4A3s with muzzle brakes made their appearance on the front lines
in Northwest Europe at the end of December 1944. "The first "combat shots" of M4A1(76)s with the brakes that we have seen are dated March 1945. The above 5th April 1945 photo, shows a unit
of the 771st Tank Battalion advancing through Muenster, Germany. We
would estimate that the sheet metal cover over the vent between the
drivers' hatches (1) and the rear view mirror (2 - only the fitting is
seen) were installed by PSC starting in July, 1944. The smoke mortar cap
and chain (3) and the T-shaped towing shackles (4) appear to have been
introduced in October. The 3 bar cleat steel tracks (5) are seen in a
few other 1945 M4A1(76) photos.

As noted above, a sheet metal
cover over the ventilator between the drivers' hatches was introduced at
Pressed Steel around July, 1944. This was requested by users in order to
provide some measure of weather protection. The authors have not found any
evidence that modification kits for the covers were sent overseas during WW II,
but have noted that many surviving Shermans that obviously didn't have this
item factory installed, had it added later during postwar upgrades. The U bolt
that can be see on the uncovered example above held the padlocks for the
drivers' hatches.
The 20th Armored Division
arrived in Le Havre, France in February 1945. They brought their equipment with
them, and oddly, at this late stage, most or all of their Medium Tanks appear
to have been powered by the Continental Radial engine. Their M4 and M4A1(75)s
had been recently remanufactured in the US. Their M4A1(76)s were new
production, and included some units with muzzle brakes. The above, dated
February 24, 1945, shows soldiers at the Division's depot in Bouchy, France
unpacking the contents of the On Vehicle Materiel (OVM) boxes in preparation
for installation in and on the tank. An item of interest here is the automobile
style horn (1 and inset). The June 1944 M4A1(76) Technical Manual only provides
details about the siren that was standard equipment from the beginning. However,
it is obvious from period photos that most second generation Shermans were
equipped with a horn. PSC appears to have replaced the siren with the horn in
the Spring of 1944.
Pressed Steel Car used just
about every type of VVSS road wheel on the M4A1(76)s it produced in 1944. In
the early months, units were equipped with either the welded spoke (A) or
pressed spoke wheels (B). The welded spoke with "small holes" (C) and
the solid, concave wheels (D) appear to have replaced the earlier types in the
Fall of 1944.
The snapshot above was found in a photo album of the 143rd Armored
Signal Photo Company. It is entitled "Bridging the Wesser," which 3rd
Armored Division records report was done starting 7 April 1945. We like
to record turret serial numbers, when possible, but despite a close
examination of the original print, we could only discern that the SN was
"probably" 2165. In any case, it is pretty high. For
what it is worth, the highest Union Steel turret serial number we have
noted in an overseas WW II photo appears to be 2237, seen on an
M4A1(76)VVSS of the 741st Tank Battalion photographed in western
Czechoslovakia shortly before or after VE-Day, 8 May 1945. In
the photo above, the larger diameter hubs suggest that the road wheels
are the "welded spoke with small holes" type. This tank has what appears
to be an armor plate attached to the front. The broken extended end
connectors illustrate the problem with these fittings. The fact that
this tank barely fits on the runners of the pontoon bridge illustrates
why the Engineer Corps "non-concurred" with any changes that made the
Sherman longer, wider or heavier than the original design..
Above shows Serial Number
67743 / USA 30125772, photographed at Aberdeen Proving Ground shortly after it
was accepted in December, 1944. Towards the end of M4A1(76)VVSS production,
along with the welded spoke with "small holes" wheels, PSC employed
the solid, concave wheels seen here. Although “mixed” road wheels can be seen
in many photos of tanks in service, it is thought that a single type was
factory installed on each unit by the original builder. Also towards the end,
metal tracks appear more frequently than rubber. On this unit, the Union Steel
turret serial number looks to be 2103. Other items of interest
include the installed rear view mirrors (1), and the installed "driver's
hatch hood" (2) for use in foul weather. For power, the windshield wiper and defroster were
plugged into a utility outlet on the instrument panel. When not in use, this
item was stored on a shelf above the transmission.
The French Army received a
small number of M4A1(76)s during WW II. These were not officially
"charged" as Lend Lease but were provided as replacement tanks
from US Army stocks. An example is provided in the 17
February 1945, document reproduced above. It states that 5
M4A1(76)s that came in through "Delta Base" (Marseilles) "were later
reloaded and shipped to the French First Army." The USA Registration
Numbers given indicate that all of these had been accepted in
October 1944. During WW II, it took on average 4 to 5 months to
get a newly built tank from factory into the hands of combat troops.
This appears to have been the case with these M4A1s, as most likely, it
would have taken another week or so for these tanks to have been
shipped, processed and delivered to French troopers. Due to the
logistics, very few Shermans built in December 1944 or later ever
served in combat in any theater during WW II. The M4A1(76)s listed may
have been issued to the 2ème Régiment de
Cuirassiers since they reported receiving some on 22 February 1945.
Above are two views of an M4A1(76) named "Rivoli
II" of the 2ème Régiment de Chasseurs d'Afrique (2ème RCA), 1ère
Division Blindée. The photo on the left shows the tank in a town near
Colmar in Alsace. On the right, Rivoli II is seen on the main street of
Meyenheim, south of Colmar, a town liberated on 5 February 1945 by the
2ème RCA. However, in discussing this series of photos, we thought the
February date might be a little early, and as it turns out, the
Meyenheim photos are dated 9 March 1945, and are described as a
reenactment ("Prise de Meyenheim - reconstitution"). In the scenes,
Rivoli II has the appearance of a recently issued Sherman, where the
crew has not yet laden her with a lot of their "stuff." Counting heads
suggests that the smoke mortar cap and chain and the T-shaped towing
shackles seen here were introduced in October 1944. Rivoli II is one of
the few Shermans seen with the driver's rear-view mirror mounted. Not
exactly uncommon, but not common either is the mounted spot and signal
lamp. The tank has the welded spoke with "small holes" road wheels
introduced by PSC in the Fall of 1944. In period photos, steel tracks
are much more common than rubber on the later production M4A1(76)s. Of
the 20 or so French examples photographed towards the end of the war or
shortly thereafter, all have steel tracks, mostly of the T49 3 bar cleat
type, but some of the T54E1 chevron type as seen on Rivoli II. Of
interest is that 14 of the tanks are equipped with extended end
connectors. Of those, all have 76mm guns with thread protectors, not
muzzle brakes. Because they took a good deal of time to install, ETOUSA
requested that EECs be applied to tanks before shipment, but it is
evident that that was rarely done. We suspect that the first French
transfer M4A1(76)s might have been an unusual case where the tanks were
shipped with EECs.
Most of the world's surviving
M4A1(76)s were rebuilt in the US postwar. A few examples on display in
Europe are still in close to WW II configuration. We believe
Serial Number 52370 was one of the few M4A1(76)s received by the French
as replacements in early 1945. It has the "serial number stamped inside
a box" (inset) seen on many surviving French Shermans. It would have
been accepted in October 1944. The corresponding Registration Number
for SN 52370 is USA 3084967, and this number is listed in the French
transfer document of 17 February. Some clues of WW II
configuration would be the presence of spot light (1) and smoke mortar
(2) fittings, and the absence of muzzle brake and mantlet cover
fittings. An original "two fingers" gun travel lock (3) would also
provide a hint. The Union Steel turret serial number is 1689, and in
one photo of Rivoli II, the turret SN also appears to begin
with 16. This tank does not show any penetration damage, so we would
guess it continued to serve with the French Army after WW II. It was
probably cannibalized for parts, before being placed on display as a
monument. Update: This Sherman has since been restored to
running condition, and as of 2021, it was located in
Saint-Méloir-des-Ondes, near Cancale in Britanny.

We have not as yet come across any documents that state the exact
number of M4A1(76)s with HVSS that were produced by Pressed Steel. A
handwritten note dated 9 April 1946 reads, "Crowley says that all
acceptances from Pressed Steel and Fisher after 1 Jan 45 were wide
track." We take this to mean that the 1255 M4A1(76)s built in 1945 were
all HVSS. If accurate, it would indicate Serial Numbers 67911 and
higher. This is confirmed by our "counting heads" method, although PSC
may have done a few "test shots" in December 1944. For instance, SN
67901 was reported as "equipped with horizontal volute suspension (E8)
and T-80 center guide tracks" and used in various tests at Chrysler's
Tank Arsenal Proving Ground from January through April 1945. Above shows
Serial Number 67927, a January 1945 production unit. Note that the
round fender supports used on the M4A1(76)HVSS were adjustable to the
contours of the cast hull. For comparison, the supports used on welded
hull models are shown in the inset. PSC completed the transition from
the original T66 tracks seen here to the superior T80 tracks by March or
April.
Between
April 6 and April 24, 1945, 169 "M4A1 (76mm gun) 23" track" are
reported to have been allocated to units of the US 12th Army Group. Keep in
mind that "allocation" is not the same as "reception."
Considering that most of the US Army in the ETO had "ceased combat
operations" before the end of April, it seems unlikely that many of these
could have been shipped and processed in time to have "fought"
before
V-E Day, May 8th. The photo above presents an interesting
possibility. It is part of a series G.I. snapshots taken in the
ETO, in what was either the Spring or Summer 1945. Unfortunately our subject is undated and uncaptioned, but
shows an M4A1(76)HVSS with that sort of “lived in” look of a combat tank. The
M4A3(76)VVSS behind it can be seen with the tactical markings of the 17th Tank
Battalion, 7th Armored Division. We would note that the 17th TB was engaged in
active combat operations right up to May 8, 1945. The trees are in full foliage
in the photo, which may or may not provide a clue as to whether this could have
been taken before the German surrender? At any rate, this tank can be seen with
the same T66 tracks as in the photo of the January, 1945 production unit of the
previous caption, but it differs in that it has the M3 Lee type drive sprocket (1),
and the mantlet cover fittings (2), although not the cover itself. No
doubt this tank would have had a muzzle brake factory installed, although here
it is obscured by a cover. The M4A3(76) in the photo can be seen with a muzzle
brake, but it looks kind of “German” to our eyes. In early February, 1945, the
17th TB “had an opportunity to test the comparative merits of the muzzle break
(sic) on the 76mm tank gun...The gunner firing the gun with the muzzle break
was able to sense every round that he fired whereas the gunner using the gun
without the muzzle break could only sense about one third of the rounds that he
fired due to the smoke and flash that covered his sight. All of our gunners are
really sold on the muzzle break and we are anxious to get them on all the tank
guns.” Indeed, the tankers of the 7th AD appear to have been anxious enough to
have procured some muzzle brakes from outside of regular channels. We have seen
period photos of at least six 7th AD M4A3(76)VVSS Shermans retrofitted with
what appear to be German (Panther?) muzzle brakes.
The
Signal Corps photo above is dated July 31, 1945, and shows a group of
M4A1(76)HVSS ready for shipment. Unfortunately, the caption only
describes this as "View
of Pier Area." Perhaps these tanks were being shipped to the Pacific
Theater in anticipation of the invasion of Japan? Ultimately, it would
appear that any M4A1(76)HVSS's sent overseas were returned. An August
1948 document lists 1272 "M4A1(76 mm) w/ HVSS"
in the inventory in the US. This figure is 17 more than the 1255 units
made in 1945. It could be a simple counting error, or may represent the
true number of M4A1(76)HVSS that were produced.
A bit of minutia regarding the little "bump stops" circled in the above
photo and in the inset is that they are rarely seen in period photos or
on surviving HVSS Shermans made by Chrysler. On the other hand, they are
almost always present on Pressed Steel Car and Fisher Body Shermans.
The original Chrysler design did not include the bump stops, but since
PSC and Fisher started HVSS production over 4 months later, their
initial orders must have been for the revised parts, with the stops
added as a safety feature. Fisher designed the alternate, fabricated
HVSS suspension arms that can be seen on the middle bogie of our
example on display in Rosenau, France.
A number of other changes were
introduced on the M4A1(76) in 1945. It has been difficult to "count
heads" on the canvas mantlet cover due to the fact that it was almost
universally retrofitted to post war rebuilds. We would guess that it was
factory installed by PSC starting in February or March, 1945. A Technical
Bulletin had been released in September 1944 noting that "The grouser
compartment plate...is very often bent in when the track is thrown, resulting
in damage to the air cleaner." Specifications were given for the addition
of scrap steel reinforcing plates. These were added "in the field" to
some M4 and M4A1 Shermans, but PSC doesn't appear to have factory installed
them until February or March, 1945. The above shows Serial Number 68252, a
March production unit which was the subject of an Inspection Control Test at
APG. Both the reinforcing plates (1) and the mantlet fittings (2) can be seen. Other
items of interest include the single rear towing lug (3), the
"framed" exhaust deflector (4) and the M3 Lee type drive sprocket
(5). Note as well the absence of the armored first aid box.
As
mentioned previously, the original quick release towing fixtures (left)
were replaced at PSC with "even quicker" release T-shaped shackles
around October 1944. A tow cable could be hooked on to the new shackles
without removing them. This saved crews a few seconds when attempting to
retrieve a tank while under fire. It was no longer necessary to have
two tow lugs per side with the new shackles, but the "extra" lugs on the
differential were retained since they also provided attachment points
for the steps. In the rear, the
examination of surviving M4A1(76)s suggests that production began with
double rear tow lugs, and the transition to single lugs was completed
in December 1944. Thus, we have a
few of the final VVSS units made in December 1944, and all of the
M4A1(76)s built with HVSS with the singles. Restorers and modelers
should note that the T-shaped shackles are not seen in WW II combat
photos before 1945.
Here is a page from the December 1944 issue of "Army Motors"
magazine that details the installation and use of "A new rapid rig
designed to save those minutes that seem like hours." Modification Work
Order G1-W18 "will be out soon okaying its use." In other words, the
kits would be available for requisition "soon" and could be retrofitted
"on the front or back of any medium or light tank, or gun motor carriage
with a tank chassis that has a one-piece controlled differential
housing." The article describes the T-shaped shackle as "the
"battlefield" towing hook" which seems as good a name as any. "Army
Motors" was published from May 1940 through September 1945 and featured a
number of cartoon characters created by comics pioneer Will Eisner who
had been drafted into the Army shortly after Pearl Harbor. Most
memorable was "Joe Dope...a lazy, corner-cutting goldbricking private
who did everything wrong. Eisner created the character and used him (and
comics) to teach the new GIs what to do and not to do with their
equipment; how to use and take care of it and keep it running in combat
conditions. This was a new concept to the military and took a bit of
selling. It proved to be a huge success and Eisner's instructive comics
appeared first in the magazine Army Motors and later in PS Monthly
during the Korean War."
The photo on the left shows
the air deflector as originally designed by the Barber-Colman Co. in January,
1943. This was used on M4A1(76)s until "late 1944," when a slightly
more rigid version with "framed" sides was introduced.
In the original
design of the radial engine Sherman, a simple screen (1) covered the
opening of the air intake on the engine deck. As can be seen, this was
attached to the armored air intake cover (2). In the event service was
required, the screen was moved out of the way as the armored cover
was lifted. The Barber-Colman system, which was adopted for
use on PSC M4A1s starting on 1 December 1943, and Chrysler M4s starting
on 1 January 1944, replaced the screen with "Pyramid Turning
Vanes" (3) that the company claimed increased air flow and engine
cooling.
The first tanks produced by
Pressed Steel Car were M3 Grants. PSC continued to use the M3 Medium type of
drive sprockets on their Shermans until the beginning of 1943, when they
transitioned to what we informally call the "plain" sprocket, as
shown on the left above. These were used by PSC until 1945, when a sprocket
with an M3 type appearance (above right) was (re)introduced. No doubt, the
"breaking teeth" problem that plagued the originals had been
remedied. Period photos suggest that these were used along with the plain type
to the end of production.
The armored first aid box can
be seen in photos of both the M26 and M24 in Europe before VE-Day. Initial
supplies were reserved for these new models. They appear to have become
available for installation on both new and remanufactured Shermans starting around
March, 1945. There are quite a few surviving M4A1(76)s on display in the US and
Europe. The armored first aid box (circled in red) appears on some but not all
of them, suggesting that there was no later production of the boxes after 1945.
Our examination of extant units for the boxes or tell tale weld scars indicates
that PSC began to install these beginning in March, and that all units made
from April, 1945 to the end of production were factory equipped with them.
From the beginning,
battlefield reports had mentioned that the externally mounted air cleaners on
the M4 and M4A1 were vulnerable to combat damage. Some units attempted to
protect the air cleaners by simply welding steel plates in front of them, such
as can be seen on a pair of M4 Composites photographed during the Leyte
Campaign in October, 1944 (left). A "protector assembly" was designed
in late 1944. As with the first aid boxes, the protectors are on only some
surviving M4A1(76)HVSS's, suggesting that there was no later production after
1945. Supplies of these appear to have become available to PSC in May, 1945,
and we would judge that not more than 250 of the last M4A1(76)s produced had
these factory installed. Above right shows the hinged configuration of the
boxes as seen on Serial Number 68975 on display in Toulon, France. This was one
of the last units accepted in May, 1945.
Above shows the M4A1(76)
displayed on a section of the Maginot Line in Hatten, France. This
tank has only "evidence" of the air cleaner protectors in the form of
the various fittings (circled). The Serial Number of this unit is
unknown, but the build number stamped on the left rear is 620,
suggesting it was accepted in March 1945. This is the only non-May 1945
or later example we have encountered, and there are about a dozen
surviving units built after this that do not show evidence of the
protectors. Perhaps it was an early trial installation, or a
post-production retrofit? We suspect that the factory installation of
the protectors was limited to late PSC M4A1(76)s and perhaps some of the
M7 Priests produced by Federal Machine and Welder. At present, we
haven't come across any documentation placing or showing them on any
1945 new production or remanufactured M4(75), M4(105) or M4A1(75).

Technical
Bulletin TB SIG 192 was published in July, 1945. This provided
instructions for the installation of the new RC-298 Interphone Extension
Kit (left). These were wanted on all tanks slated for the planned
invasion of Japan. The absolutely last Sherman built rolled off the line
at PSC in July, and it seems possible that they might have received
some "preview" kits before production ended. The "Infantry Phones" (or
the fittings) are seen on the majority of surviving M4A1(76)s in Europe.
We believe these were installed during the early 1950s remanufacture
program, as one of the specifications was "Redesign inter-communication
system." TB Sig 192 instructed that the phones be mounted on the upper
rear hull on the right. In the case of VVSS units, the most common
method for accommodating the
infantry phone as noted on surviving examples, involved the removal of
both of the spare track holders from the rear. The phone was then
installed on the right side. The track holders were discarded
(apparently), and three spare tracks were then mounted to studs on each
side of the turret, such as can be seen above right on Serial Number
37903. This, we would say, was the method used by the primary rebuilding
contractor, Bowen-McLaughlin-York.
A less common method
of accommodating the infantry phone is seen more often
in period photos than on surviving M4A1(76)s. In this case, only
the spare track holder on the right was removed, and the entire
fixture was mounted on to the turret on the right side. We suspect this
method was used by either Rock Island Arsenal or Brown & Root. The
M4A1(76)VVSS on display at the Pilzen Zoo in Czechoslovakia can be seen
with this configuration.

An August 1948 Inventory has
it that there were 1956 M4A1(76)s in the US. The vast majority were in storage
depots, with only 319 "Ready For Issue." As noted earlier, 1272 were
listed as "w/HVSS." Exactly one M4A1(76)HVSS was listed as in service
with the troops. In late 1948, the US began a rebuilding program in order to
provide tanks to its Cold War Allies. France was the principal Mutual Defense
Assistance Program (MDAP) recipient of the M4A1(76), and beginning in 1950, is
reported to have received 421 VVSS and 833 HVSS units by early 1954. Belgium is
reported to have received 15 VVSS and 65 HVSS units during the same period, and
The Netherlands is reported to have received 50, although the suspension type
was not listed in the documents we examined. No doubt other countries received
some M4A1(76)s. For instance, there is a surviving M4A1(76)HVSS in Portugal,
which is reported to have received 5 units, listed generically as "Tank,
Med, 76mm Gun, M4 Series." The above shows the scene at the New York Port
of Embarkation in 1950, as some MDAP M4A1(76)s, neatly shrink wrapped, await
shipment to Europe.

Bowen-McLaughlin-York, Inc.
was the principal contractor tasked with rebuilding the M4A1(76)s, and
preparing them for MDAP shipment. The Signal Corps photo above was taken at the
Letterkenney Ordnance Depot in Chambersburg, Pennsylvania in the Summer of
1950. The petroleum silos in the background were WW II surplus, and many of the
tanks at the depot had been stored inside them. In order to reduce damage to
the roads, local officials had asked that the turrets and hulls be shipped
separately during the 30 or so mile trip from Chambersburg to the BMY facility
in York, Pa. The matching letters and numbers painted on the hulls and turrets
indicate that it was intended to restore the original components, although we
doubt it would have been possible to do that in every case.
The 1950's rebuild specifications included an order to
convert the tanks to dry stowage. The "wet" part of "wet stowage" had been
somewhat questionable from the start. Each 5 round 76mm ammunition rack had 3
sealed chambers that were filled with liquid. It was thought that if the ammo
rack was penetrated, the liquid would be dispersed, and at least slow the
progress of an ammunition fire in order to give the crew a few more seconds to
escape. Above, several of the racks are shown in place. We've circled the filler
plugs of the liquid containers, including the one for the 6 round ready rack
mounted on the turret basket floor. Some of the men involved in the wet stowage
program were not convinced of the worth of the liquid chambers, and requested
additional comparative trials. They noted that relocating the ammo bins to
better protected positions on the floor of the hull (as the British had
requested in 1942) was the most effective part of the modification. They also
mentioned that tankers wanted to carry as much ammo as possible, and the
inclusion of the liquid chambers came at the expense of an additional 10 to 12
rounds. In any case, the rebuild specification directed that the ammo racks be
drained, and the filler holes plugged.
Although they were not part of
the original design of the Sherman, from about mid 1943 until the end of
production, the Ordnance Department required the factory installation of sand
shields. They were NOT popular with the troops. "Experience in this
theater indicates that sand shields on tanks are superfluous, and are quickly
taken off or knocked off by troops. Recommend that War Department be advised
and tanks be shipped without sand shields." Even so, Shermans
continued to have them factory installed until the end of production. For
instance, they can be seen in our earlier July 1945 "View of Pier
Area" photo. However, while not listed in the rebuild specifications,
photographic evidence suggests that sand shields were eliminated from the MDAP
M4A1(76)s. Above left shows USA 30126829 with sand shields on its way to Bowen
McLaughlin in Summer 1950, while the photo on the right shows 30126687 without
them arriving in Cherbourg later in the year.

Earlier we mentioned that,
starting in the Summer of 1944, the left front of the turret was no longer
machined out to provide for an antenna. Ironically, the vast majority of
surviving M4A1(76)s have a steel bracket (inset) welded on, along with a small
hole in this area. We consider this to be a good clue of a postwar rebuild. The
photo above is dated June 14, 1951, and shows US Congressmen inspecting some
MDAP M4A1(76)s of the French 6th Régiment de Chasseurs d’Afrique (Armored Regiment)
in Speyer, Germany. Note the antenna mast bases mounted on the left front
fittings of these tanks.
Not all of the post war
M4A1(76)s were shipped overseas as MDAP. Several hundred remained in the US. The
Army's preference at the time, as during WW II, was to equip its troops with as
many Ford V8 engined tanks as possible. Of course, the M26 was the most desired
type, but not enough had been produced, so that the M4A3(76)HVSS was considered
an acceptable substitute. These two types served in the Korean War. While the
M4A1(76)HVSS was characterized as the next best acceptable substitute after the
M4A3(76)HVSS, there is no evidence that any fought in Korea. They were used in
the US by the Army and National Guard as test and training tanks well into the
1950s. The above shows a platoon of M4A1(76)HVSS's of the 106th Tank Battalion,
33rd Infantry Divison on a target range at Camp Ripley, Minnesota in the Summer
of 1954.
Unlike the MDAP M4A1(76)s in
Europe, the majority of the 40 or so surviving examples in the US don't show
evidence of ever having had infantry phones installed. Some of them have plates
affixed to the front indicating that they were "Overhauled" by
Watertown Arsenal (Massachusetts) in 1950 (inset). Evidently, Watertown's
contract did not provide for the installation of the phones. The above photos,
courtesy of Jim Goetz, provide two views of Serial Number 68146, USA 30126125
on display in Kingman, Kansas. This is one of the few surviving Shermans that
has somehow managed to retain its original USA Registration Number. This tank
would have been accepted in February 1945. We don't think that ANY Shermans
were built with the T84 rubber chevron tracks seen here. Most likely, the
initial design, "two fingers" gun travel lock was installed on 68146
as original equipment. Like the T84 track, the more secure "clamp"
type gun travel lock, which can be seen on most surviving M4A1(76)s, was
designed during WW II based on user feedback. However, neither of these items
appear to have been available before the end of Sherman production in July
1945.
The M4A1(76)'s upper hull casting carried part number E8595. The casting
marks can be found inside on the firewall facing the fighting
compartment. The examination of a number of surviving examples suggests
that only two foundries produced these hulls - General Steel at their
plant in Granite City, Illinois, and Continental Foundry and Machine at
their facility in Wheeling, West Virginia. General Steel appears to have
restarted at serial number 1 when they switched production from 75mm to
76mm hull castings. Above left shows the casting info from GS hull
serial number 1435, cast in March 1945. The "C" just behind the date
most likely stands for "Commonwealth," the official name of General
Steel's Granite City plant. The highest GS E8595 hull SN we have
recorded at present is 1455. The markings typical of
Continental-Wheeling E8595 hull castings are shown on the right.
Counting heads suggests that C-W retained the original serial number
sequence from their M4A1(75) castings when they switched to 76mm hulls.
We would guess that they started the E8595 castings at around SN 2750.
The highest C-W hull SN we have encountered is 4923. Dates are of great
value to our research, but unlike GS, C-W hull markings do not include
the date of manufacture. The authors would gladly receive such
production data information from any readers who encounter a surviving
large hatch M4A1 Sherman.
Recently,
we were asked by a modeler friend if we had come across any
documentation that would indicate that there was a difference
significant enough to mention between the hull castings made by General
Steel and Continental. The answer is no. However, after having reviewed a
sizeable number of photos of surviving M4A1(76)s, a comparison of the
hull castings with General Steel logos to those without, presumably all
Continental-Wheelings, suggests that the GS hull castings are more
symmetrical and have sharper edges in the areas where they project out
from the drivers' hatches. Under the right light conditions, it does
appear that, on the C-W castings, the bulge in front of the bow gunner's
hatch is noticeably more pronounced than the bulge on the driver's
side. Furthermore, the "eyebrow" bulge above the bow machine gun
aperture is "barely there," or in any case, smaller and semicircular on
GS hulls. On the Continentals, it is larger and not semicircular, but
curves off towards the center. Finally,
we might observe that on this example and many others, the dust cover
fitting appears to be an inch or so wider on the C-Ws. The upshot is
that if it were possible to line up, say, 10 GS and 10 C-W M4A1(76)s in
random order, and hide the GS logo, it wouldn't be hard to distinguish
between the two based on the bulges.
As
a matter of Sherman minutia, Pierre-Olivier has observed the "E8595"
part number cast on the front of five surviving General Steel hulls that
he has been able to enter. Note that there are two sets of markings
(circled and inset) visible on this example and that they are reversed and upside
down. P-O
has been able to look around inside a small number of Continental hulls
but reports that he has not seen these markings so far.
Ram,
M3A1 Medium and M4A1 Sherman hull castings have been noted with
"indentations" on the edges of the opening for the engine deck.
Pierre-Olivier has done a head count of over 100 M4A1(76) hulls and has
found that General Steel E8595 castings are consistently seen with
"indents" on the rear corners of the engine deck opening as shown above
on the left, circled in red. P-O' s shorthand for this was "bottom
corners." On the other hand, C-W hulls examined did NOT have the rear
indents or "no bottom corners." This "positive/negative" provides us
with another minor distinguishing feature between the two companies'
hull castings. Going a bit further, C-W hulls are consistently noted
with indents machined out in the front corners in the configuration
shown above in the middle. We are constrained somewhat by a lack of
photos, but can mention that some GS hulls have been observed with
straight or more frequently, half round indents on the front sides as
shown above on the right.
The highest Union Steel turret
serial number we have recorded is 3623, as seen above on a beautifully restored
June 1945 production unit. 3623 is about 200 more turrets than would have been
needed, but Pressed Steel was awarded several more contracts in 1945. One
called for an additional 1560 M4A1(76)HVSS, and another was for 1030 units of a
new type, the M4(76)HVSS. These contracts were let in the event that the war
with Japan continued past 1945, but were terminated with the end of World War
II. In October 1944, PSC had been given a contract to produce 150 M4A2(76)HVSS,
and actually did manufacture a total of 21 in April and May 1945 before that
contract was terminated. Three 7054366 turrets made by Ordnance Steel Foundry
have been seen on surviving M4A1(76)s. Their Serial Numbers are 8, 84 and 94,
which suggests they were produced in small numbers, perhaps not more than 100. They
must have been introduced a month or two after the "eliminate the smoke
mortar" directive was issued in January 1945, as none of them were drilled
out for the smoke mortar. Our head count suggests Union Steel turrets 2721 and
higher were undrilled.
While
Chrysler and Fisher stamped the Serial Number on the rear towing lugs
of their large hatch Shermans, Pressed Steel Car does not appear to have
stamped it anywhere on the exterior of the AFVs they produced. However,
some surviving French M4A1(76)s have been observed with the serial
number stamped on the front of the hull as shown in the left side photo.
PSC built M4A1s (both small and large hatch) have been noted to have a
loose build sequence number stamped on either side of the hull in the
rear. In the event the serial number cannot be found, the sequence
number has some chronological value.
Shermans were provided with dataplates, which in most cases, were
affixed to the wall of the lower hull, just to the left of the driver.
An original dataplate will include the name of the builder. Above left
shows the original Pressed Steel Car dataplate from an October 1944
M4A1(76), Serial Number 52460. "GRUHLKE" is seen stamped in the box at
the lower right on this and a few other original PSC M4A1(76)
dataplates. Judging from what has been noted on the original dataplates
of most other types of Shermans, we would have expected to see the
initials of Col. John Slezak, Chief of the Chicago Ordnance District.
However, in early 2024, one of our readers, Jeff Wszolek, wrote to tell
us that he had stumbled on Mr. Gruhlke's unusual surname "while
researching US armor-piercing ammunition production at the National
Archives in Chicago." Turns out Leonard Gruhlke was a civilian, the head
of the Inspection Department at PSC, according to a document Jeff
examined. The photo on the right shows the dataplate installed in
M4A1(76)HVSS Serial Number 68505 on display in the Muna Museum in
Marktbergel, Germany. Note that no manufacturer is listed. We believe
that this dataplate replaced the original when 68505 was remanufactured
for MDAP in the early 1950s by Bowen & McLaughlin. The "ALS" stamped
in the box on the bottom right has been seen on a few other similar
dataplates. Again, we would expect that these would be the initials of
an Army official, but perhaps could be those of a civilian inspector at
BMY. VVSS or HVSS suspension is not listed as part of the nomenclature
stamped on the top line. The "Fighting Weight" seen on the dataplates of
the MDAP units is stamped "75300" LBS regardless of suspension type.
However, this would represent the weight of an M4A1(76)HVSS, whereas an
M4A1(76)VVSS would have had a fighting weight of about 71000 pounds
depending on the type of track installed. Left side photo courtesy
Daniel Röttger, right courtesy Michael Lembo.
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