Thanks for the replys guys! Searching for reference material on this tank was very hard to find. From what i found, the KV-122 was only a test tank, and was made obsolete by the JS-2, But the few that were produced were most likely used in combat. The kit markings are the 62nd Gaurd Heavy breakthrough tank regiment, 8th guard tanks corps, in autumn 1943. The kit went together really well, and wasnt really missing any details. One thing that the kit might need is some PE fender support brackets. Other than that it is an awesome build, i might even do another one. PST kits are very nice, and well worth the money.