This is the Trumpeter 00360 kit in 1/35 scale, of the ‘Russian Heavy Tank, KV-1 model 1942, Lightweight Cast Turret’.
The superior armor protection of the heavy cast turret on the KV-1 model 1942 tank has its cost! The weight of the tank now reaches 47 tones and this weight are consider heavy even for a modern tank standard!
The KV series utilize the same engine without major changes and the more and more added heavy weight drops the maximum speed from 35 Kilometers/hours to 28 kilometers/hour.
Off road performances are even worst and hard to operate. To solve the problem, a lightweight cast turret was born. One feature helps to identify turret of this type – A large cast ring around rear machine gun mount.
Source: Trumpeter website