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.
KV-3/107 Heavy Tank
KV-3 (Object 223) - Tank Encyclopedia
Soviet T-44 Medium Tank (1944)
FV4201 Chieftain
Kliment Voroshilov tank - Wikipedia
Object 223 (kv-3) - Passed for Consideration - War Thunder - Official Forum
KV-3 (Object 223) - Tank Encyclopedia
KV-3, Forgotten Hope Secret Weapon Wiki
T-10 soviet heavy tank (1952)
KV-3, Forgotten Hope Secret Weapon Wiki
How well would an up-gunned Matilda II tank to 75mm have fared in WW2? - Quora
KV-3, FirearmCentral Wiki
KV-3 (Object 223) - Tank Encyclopedia