Its a T44.
This new tank saw limited use in the end of WW2. A few were deployed in April/May 1945 and took a small part part in the final Germany battles.
It used a new hull which was later developed into the T54/55 hull and an enlarged turret similar to the T34/85s turret.
It mounted an 85mm gun although there were plans to arm it with a 100mm weapon. IIRC this turret design proved inadequate for the 100mm gun and a new turret was designed which lead to the T54.
A very good tank for the period.
