Comparing: Pz.Kpfw. IV Ausf. D vs. ST vz. 39

This modification of the Pz IV was developed in October 1939. The vehicle had enhanced armor and an improved, external gun mantlet. The tank was mass-produced until May 1940, with a total of 229 vehicles manufactured.

V-8-H was a further development of the PS-II-b medium tank and the P-II-b light infantry tank. The vehicle underwent trials from the summer of 1937 through the spring of 1938. In the fall of 1938, additional trials were held. After all faults were removed, the tank saw service under the designation ST vz.39. The vehicle never entered mass production.