[BW] IS-7 - Super Heavy Tank

In 1948, the IS-7 heavy tank was developed.[9] Weighing 68 metric tons, thickly armoured and armed with a 130 mm S-70 gun, it was the largest and heaviest[10] tank ever tested by the USSR. Although it was in many ways an innovative design, it was never accepted for mass production due to its cumbersome size and the very impractical layout of its fighting compartment.

Source: Wiki