I think that the Soviet KV-85 and the German StuG 40 Ausf. G should become the next collectible vehicles after guided antiaircraft guns. The KV-85 appeared at the end of the Battle of Kursk. This tank did not gain the fame that the T-34-85 or IS-2 deserved, since it was produced in a small number (148 pieces) and by the summer of 1944 the regiments that fought on these tanks were transferred to the tank IS.   Nevertheless, the KV-85 was noted in battles in Ukraine and in the Velik