The first prototype of the KV-1 heavy tank (U-0) before sending it to Moscow. September 1939. In the turret of the KV-1 tank two guns mounted 76-mm L-11 and 45-mm. In December 1939, before sending the KV-1 U-0 to the 20th Heavy Tank Brigade, the 45-mm gun was dismantled.
Time taken: September 1939