Comparing: T-127 vs. Stuart I-IV

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.

Mass-produced from 1941 and supplied to the U.K. under Lend-Lease. A a total of 6,889 were supplied to the British from M3 to M5A1 variants. The M3 tanks were designated Stuart I by the British, while the M3A1 version was designated Stuart III. They first saw action in the battle at Sidi Rezegh.