50 Roubles Tank Destroyer OBJECT 263

Object 263 was a Soviet tank destroyer developed in the late 1940s as a successor program to wartime self-propelled gun doctrine, mounting the 130mm M-46 field gun on a modified IS-7 hull. It never entered serial production — the project was cancelled in 1952 when the military concluded the vehicle's low profile compromised crew access to the breach. A coin commemorating a prototype that saw no service and no combat is an unusual editorial choice, even by Soviet commemorative standards.