KV-3 (Object 223) - Tank Encyclopedia

The KV-3 was an early war Soviet heavy tank armed with the powerful new 107 mm ZiS-6 gun mounted on a modified version of the KV-220 hull.

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KV-3, FirearmCentral Wiki

Tanks and Armored Cars of Soviet Union - Interwar and WW2

KV-3 (Object 223) - Tank Encyclopedia

Object 223 (kv-3) - Passed for Consideration - War Thunder - Official Forum

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Soviet IS-III (1944)