Comparing: T-28 vs. T-28E with F-30

The T-28 tank was developed by the Experimental Machine Design Bureau of the Voroshilov plant. The vehicle saw service on August 11, 1933. A total of 503 tanks were manufactured at the Leningrad Kirov Plant between 1933 and 1940. During mass production, the T-28 tank underwent a number of changes in design and modifications. The vehicles were used in the war with Finland in the winter of 1939–1940 and at the beginning of WWII.

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.