Comparing: Cruiser Mk. IV vs. BT-SV vs. T-127

An upgraded version of the cruiser tank Mk. III. The tank featured armor enhanced by the additional screens. The Cruiser Mk. IV fought in France in 1940 and in the early stages of the North African Campaign. This vehicle last saw action in the winter of 1941–1942. A total of 655 tanks were mass-produced.

Experimental tank. Developed by the Tsyganov group from 1936 through 1938. The vehicle underwent field trials, but never saw service.

Developed together with the T-126 at Factory No. 174 during the summer of 1940. Vehicle development was suspended during the preliminary design phase and then discontinued due to problems with the V-3 diesel engine.