A note on unit "020 KV-1S" Finnish spob35. It was not infact a KV-1s but KV-1 Model 1941. The "S" in the naming ingame now might be from a German designation or something else but the tank was infact model 1941.
Here are the pictures linked from "Andreas Larka's" site showing the two KV-1 tanks in the Parola tank museum Finland:
First the KV-1 model 1940 (E) whit the additional bolted armor plates and shorter F-32 gun.
Second the KV-1 model 1941 whit the longer ZIS-5 gun in the new type of cast turret. Yes the name was actualy ZIS-5 although the gun was wery similar to the F-34 used in T-34 tanks. It was designed to fit the KV-1 turret and redesignated as the ZIS-5. But for gameplay purposes it makes no difference if it uses the F-34 gun just a minor thing.