Here's a picture of a M4 Composite mated with a 105mm turret. It resides (or did) at Fort Wayne in Downtown Detroit, MI.
What's the likelihood that it isn't a postwar combination?
We know that 105mm howitzer tanks were put on late M4s and M4A3s by Chrysler Tank Arsenal (up the road from Detroit) starting in Feb '44. We also know that the Composites were made by Chrysler Tank Arsenal (production ending Jan '44).
What if the M4 composite was leftover stocks and was shifted onto the M4 (105) production line?
Any photographic evidence of these in the field by chance?
Thanks for any input here.