Contrary to my skepticism of the "early" T-34 "company" ( TMP link ), this presentation fully passes "Mr. Picky's Sniff Test"(tm).
It looks like an up-armored 1942 production KV-1 (classified as KV-1C by many German and British sources). That's the right tank for the description of "up to 120mm (4.7 inches) of cast steel armour on the turret." Also, 5 is a workable number for a company (although some versions of the company TOE had 7).
A bit odd of a combination in that the turret is cast, but the hull looks like a welded up-armored hull (rather than a cast up-armored). But hulls and turrets were mixed from time-to-time (sometimes frequently). So I don't object.
However, I do very much object to the KV-1s as it is presented. A KV-1s did indeed have an updated turret, which they show / provide. Looks good. Fine. But … it also had an updated hull! And this is not provided.
The visual identifiers of a KV-1s are the rounded turret with two hatches on top, offset right and left from the centerline, with a comander's cupola on the rear-most hatch. All find and good.
It also had a refined hull shape, with a noticeable downward slope on the engine deck. GONG! Thank you for playing, next contestant please…
-Mark
(aka: Mk 1)