Thanks Terry. What research I have done said the same thing as to Tigers at Kharkov. Found references to "some" Tigers in Das Reich. Couldn't find specific numbers but at least I know some were there. -- AlTigers were in heavy tank battalions acting independently or attached to Panzer divisions. The K&C snow tiger is modeled after Tiger 111 of 1./s.Pz.Abt.502 during January of 1943 at Mga near Leningrad. The unit had 5 Tigers. The tank numbers were just white outlines.
As for Kharkov in February-March 1943, I think only ss.Panzer 2 "Das Reich" had any Tigers in s.Pz.Abt. 503 and 505. I have a photo somewhere of a grey whitewashed Tiger from one of these units with a solid black number.
Terry