As a direct response to the complaints about the KV-1, a lighter and slightly smaller version was developed and produced in 1942 and 1943. This version, the KV-1S, was produced in greater numbers than the original KV-1. Although the armour is thinner, particularly on the sides, the greater reliability was considered to outweigh the diminished protection. The improved KV-1S chassis was also used as a base for the SU-152 and KV-85 before the development of the IS tank chassis in late 1943.
Ordering the small variant will give you a single tank.
Ordering the medium variant will give you two tanks.
Ordering the large variant will give you five tanks.
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