Model Variants (Including Prototypes)
KV-1 (Model 1939) - Initial Production Model; fitted with 76.2mm L-11 series main gun; 141 examples produced.
KV-1A (Model 1940) - Fitted with F-32 76.2mm main gun; revised mantlet.
KV-1B - (Model 1941) - Improved armor thickness up to 100mm; cast turret; long-barreled F-34 main gun.
KV-1C (Model 1942) - Cast or welded turret; improved armor thickness (130mm); improved powerplant of 600 horsepower; 76.2mm main gun.
KV-1S - Improved speed with less armor protection (sans applique armor); redesigned cast turret; revisd rear compartment; 1,370 examples produced.
KV-85 - KV-1S model fitted with D-5T 85mm main gun; IS-1 turret; sans bow machine gun.
KV-13 - Prototype for redesigned KV; becoming the IS-2.
KV-2 - Heavy Assault Tank; fitted with M-10 152mm howitzer; 334 examples produced.
KV-8 - KV-1 model fitted with ATO-41 flamethrower; also fitting the 45mm M1932 gun; 42 examples produced.
KV-8S - KV-1S model with ATO-41 flamthrower in place of co-axial 7.62mm machine gun.
KV-14 - Prototype fitting 152mm main gun; becoming the SU-152 self-propelled gun.
Panzerkampfwagen KV-IA 753(r) - German designation for captured KV-1.
Panzerkampfwagen KV-IB 755(r) - German designation for captured KV-1.
(Sturm)Panzerkampfwagen KV-II 754(r) - German designation of captured KV-2.