Comparing: Pz.Kpfw. III Ausf. K vs. Pz.Kpfw. IV hydrostat.

This tank was developed on the basis of the later Pz.Kpfw.III Ausf. J chassis, combining it with the Pz.Kpfw.IV Ausf. F2 turret and a 75-mm gun. The first design plans were completed by the end of December 1941. Manufacturing began, but the vehicle proved overly complex and production was soon canceled. A total of 50 vehicles were completed and used as command vehicles. They featured 50-mm guns; the 75-mm guns were never mounted.

This experimental version of the Pz.Kpfw. IV Ausf. G, incorporating hydrostatic drive, began development in 1944. Trials were discontinued due to the unreliability of the transmission and the lack of spare parts.