Today's "Odd Tank" is the Soviet 'Object 911B'
Built in the 1960's, the Object 911B was a prototype Light Amphibious Tank and would only have one example built.
It was based on the prototype IFV Object 911 which was a competing design against the BMP-1. The tank had an adjustable suspension and at its highest it would be as tall as 1.6 meters or 5 feet, 3 inches and at its lowest it would measure 1.2 meters or 3 feet 11 inches.
In the end it would be rejected like its IFV counterpart as the BMP-1 was a more favored option.
The main weapon is a 73mm 2A28 Grom smooth-bore gun.