sentences:  A large, open-topped fighting compartment, much like that fitted to the Panzer IV-based "Hummel" self-propelled 15 cm howitzer, was built where the turret was intended to go in the original design.Two vehicles (named after Max and Moritz) were built, both of which served on the Eastern Front.One vehicle was destroyed, the other captured at Stalingrad in January 1943, with 22 kill marks painted on the barrel.