Pre-war evolution of Soviet medium tanks from production from the plant No. 183 (Kharkov). Left to right: BT-7 (A-8), A-20, T-34-76 with L-11 gun (1940), T-34-76 with F-34 gun (1941).
Source: the archive of the Kharkov Morozov Machine Building Design Bureau.
Place of photo: Kharkov, USSR
Date of the photo: 1941