I think I can add to this - the guy holding the dog is Sukma Cocoff, he later became a disgraced intelligence officer in Third Shock Army (BRIXMIS may recall the incident) to his right is the man that replaced him, Ripma Bolocoff so named after the unfortunate incident with the dog.
It is little known fact that the Soviet tanks were so simple to operate a dog could be trained to do it. The retention rates for canine crews were better than the conscripts so a trained canine tank commander was a good investment. The dog is actually Senior Sergeant Fidowksi, 35 Gds MRD.
The conscripts are simply there to feed and walk the dog. It is easier to train them to look after the dog than to operate a tank.
T62 confirmed. 3 x bolt rather than the manditory 6 bolt T72 headlight fixings. 3 vertical press lines on front wings and front compo err coms bin included. On top of that my Ivan/Czech commie wife confirms it and that is good enough for me!!