This is a list of M-series 2 1/2 and 5 ton trucks. Hope this helps,this body style i believe was used from 1954? to 198?
M 44 series trucks
TRUCK, CARGO: M35A1,
M35A2, M35A2C, M36A2; TRUCK,
TANK, FUEL: M49A1C, M49A2C; TRUCK, TANK,
WATER: M50A1, M50A2, M50A3; TRUCK, VAN,
SHOP: M109A2, M109A3...