A further modification of the KV-1 heavy tank series developed in the summer of 1942. It passed into Red Army service on August 20, 1942. Compared to its predecessors, KV-1S had several design features which allowed for the tank’s weight to be reduced to 42.3 tons. Also, the KV-1S had increased top speed, maneuverability, and durability. However, the 76-mm ZIS-5 gun remained. This, coupled with reduced and inefficient armoring, made the new vehicle basically equal to the T-34 in terms of battle performance. A total of 1,083 vehicles of this modification were manufactured. This tank was widely used on all fronts of the Great Patriotic War.
KV-1S mod. 1942
V-2K
9R
KV-1S
76 mm ZiS-5
KV-1S mod. 1943
V-2IS
10R
KV-122 mod. 1944
85 mm S-31M
10RK
122 mm Howitzer S-41
Characteristics are specified for vehicles with crews trained to 100%.