Comparing: ST vz. 39 vs. T-28E with F-30

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.

The T-28 tank with the 85-mm F-30 gun was developed in 1941. One prototype was built and underwent trials. Unlike mass-produced T-28 tanks, the vehicle featured different armament. No sources were found proving that the tank was mass-produced or used in action.