Issued by the Soviet Union in 1970, this 4 kopeck commemorative stamp honors the 150th anniversary of the discovery of Antarctica. The design features the ships Vostok and Mirny, used in the 1820 Russian Antarctic Expedition led by Fabian Gottlieb von Bellingshausen and Mikhail Lazarev. On the right is a stylized map of Antarctica with exploration routes marked. The vivid red banner highlights the anniversary, while deep blues evoke the icy polar seas. A notable collectible for polar exploration and maritime history enthusiasts.