Issued by the Soviet Union in 1981, this 15 kopeck commemorative stamp marks the 25th anniversary of the Soviet–Indian Shipping Line (Советско-Индийской Судоходной Линии). The design features the bow of a cargo ship symbolizing maritime partnership, set against the national flags of the USSR and India. Above, the red Soviet hammer-and-sickle contrasts with the Indian tricolor and Ashoka Chakra, illustrating a spirit of cooperation in trade and diplomacy during the Cold War era. The “XXV лет” (25 years) inscription celebrates a quarter century of successful joint maritime operations that strengthened economic and cultural ties between the two nations.