If we’re going by British naming it should be Sherman IVC. If American then M4A3 (76) W HVSS. Though it can be (17pdr)
It would be Sherman IVC but it wasn’t British. At this point it would be American. It would probably be correct to call it “M4A3 (17pdr)”. M4A3(76)W was reserved for the ones with the M1 cannon, but “M4A3(76)W (17pdr)” might be valid too. However, given that “Firefly” was never official yet a widespread nickname, and also that these M4A3s never got a real name, I think “M4A3 Firefly” would be fine.
Unless they change the OG Firefly to read Sherman VC instead of Sherman Firefly, I personally would rather see M4A3 Firefly.
It’d be great if some actual photos come to light. The images used was purely a test vehicle with a Firefly turret simply put on top of an unmodified M4A3 hull.
I don’t want an American Firefly, but I do want is a British M4A3 76 (I want the high power APHE)
To the best of my knowledge, the British unfortunately never used the M4A3 (76), only receiving the M4A1 (76) W and a small quantity of M4A2 (76) W (1330 units and 5 units, respectively, according to Hunnicutt). The closest thing would be the 20 units of M4A3 (76) W HVSS loaned to the Canadians during the Korean War (source).
Either one is good, I can never remember exact Sherman models but a M4A1/A2 (76) W would be nice in the British tree.
This is also the tank irl that got the Observation camouflage that the M4A3 (105) has.
Play the US tree then
M4A1 76 was relatively common in British service. They received over 1000 of them.
I don’t want to have to start grinding another tree just to play Shermans
I like this suggestion and just wanted to add some more info to it about the US and 17pdrs
A M4A2 varient was also tested, No. 3065484:
Spoiler
There is also this document here at lists a few shermans that were modified to carry a 17pdr for testing some of which are listed as having HVSS suspension
Spoiler
Not to burst your bubble, however, the Sherman pictured is actually a display piece put together by the Ordinance Museum. The turret was indeed one of the Firefly turrets tested in the US but it wasn’t ever fitted to that M4A2 for testing.
Shot sv mk1 was available for the 17 pounder in late June early July 1944 after D-Day the Italian firefly VC already has it
The image provided in the original post isn’t HVSS tho