Rear deck looks a mite high for a M3 , I'd guess a M5 .
These were still effective against the small Jap tanks even till the war's end. They never fielded a bazooka type weapon .
Chris
They used the same turret for both according to my sources, what are you basing your response on? There were many variations between the M3 with the D37812 turret and a M3A3 which then led to their using the new improved turret on the M5A1.