Comparing: Object 777 Version II vs. T57 Heavy Tank

The Object 777 is a unique project of a heavy tank. The vehicle was developed at the Chelyabinsk Kirov Plant. By 1953, the design plans were made, and the dummy vehicle was built. The prototype was to feature a cast hull and streamlined turret. The 122-mm M-62-T2 gun was to be mounted on the tank. However, development proceeded no further. The Object 777 never entered mass production nor saw service.

A project of a heavy tank with an oscillating turret and automatic loading. Developed from 1951. Experimental turrets for 120 mm and 155 mm guns were manufactured by 1957. However, the project was deemed unsuccessful and development was discontinued.