To make up for this loss of production , Krupp displayed a substitution StuG on a Panzer IV chassis to Hitler on 16 -- 17 December 1943 .
Bombing raids on the Alkett factory resulted in significant drops in StuG III production in November 1943 .
To make up for this loss of production , Krupp displayed a StuG III StuG III on a Panzer IV chassis to Hitler on 16 -- 17 December 1943 .
Bombing raids on the Alkett factory resulted in significant drops in StuG III production in November 1943 .