50 Roubles Light Tank Tetrarch

The Tetrarch was a British light tank supplied to the Soviet Union under Lend-Lease, with roughly 20 vehicles delivered before the program shifted to heavier priorities. Soviet crews found it underpowered for the Eastern Front and it saw limited frontline use, deployed most notably during the Kerch landings in 1942. Its appearance on a Soviet commemorative coin is a quiet acknowledgment of Allied material cooperation — not something the USSR advertised loudly during the Cold War decades that followed.