A view of one of the early M33 prime movers shows its relationship to the M31 TRV,including the characteristic rear stowage bins.

M33 prime mover

the then lieutenant colonel Creighton Williams Abrams Jr. (born in September 15, 1914) in late 1944 where he was in the 4th armored division where he was the commander of the 37th Tank Battalion. some people view Abrams as the highest scoring U.S tank ace of the war (U.S sources say 12 tank kills. Russian sources say up to 50 tank kills). Patton viewed him as the best tank commander, and all his men had great respect for him he would later be a four star general in Vietnam. he would die in September 4, 1974 from lung cancer. in honor the m1 Abrams was named after him. 

Creighton Abrams Jr.

A M33 prime mover is used to tow a 240mm howitzer near Mt.Porchia,Italy on 27 of January 1944.(rudeerude)