One prototype tank was built in 1934.

This was done in 1945 and the two prototype tanks received the designation T-44-100.

A version of the maritime model was adapted for use in several prototype heavy tanks in 1939, although none were placed into production.

Designed with several innovative features, some of which were controversial at the time, the Skeleton Tank project did not proceed beyond the single prototype tank.

September 6 - The first prototype tank is tested for the British Army for the first time.

The prototype tank wasn't adopted for a number of reasons.

The organisation had designed a new prototype tank, named Black Eagle but it did not enter production.

The results of the prototype tank were excellent, displaying remarkable mobility in the difficult terrain of Souain.

They join the finals match, driving a prototype tank that the Rabbit team found in episode 7.

The T54 was a series of prototype tanks of the 1950s.