I had found an information in polish military press, that few moth ago a group of military enthusiasts finished working on restoration of soviet IS-2m heavy tank. It is kept at the Museum of Armour belonging to the Land Forces Training Center in Poznan. This tank was produced in 1945 and served in the military school as a training vehicle. Fortunately it avoided the fate of a target at the firing ground. It took about 2 years to restore it completly, so it is fully operating.