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.
Sd.Kfz.222/223 - Tank Encyclopedia
Kliment Voroshilov tank - Wikipedia
AMM6146 AMMO by Mig - Stalingrad Vehicles Colors - German and Russian Camouflages in The Battle of Stalingrad, AMO-6146 : Arts, Crafts & Sewing
Archives
Tanks and Armored Cars of Soviet Union - Interwar and WW2
KV-3, Forgotten Hope Secret Weapon Wiki
KV-3 (Object 223) - Tank Encyclopedia
T-10 soviet heavy tank (1952)
WW2 Soviet KV-4 Archives - Tank Encyclopedia
KV-3, Forgotten Hope Secret Weapon Wiki