FDC made in the Soviet Union, 1987. The text on the envelope reads:”North Pole-1″. North Pole-1 was the world’s first Soviet manned drifting station in the Arctic Ocean, primarily used for research.
North Pole-1 was established on 21 May 1937 and officially opened on 6 June, some 20 kilometres (12 mi) from the North Pole by the expedition into the high latitudes Sever-1, led by Otto Schmidt. The expedition had been airlifted by aviation units. On 19 February 1938 the Soviet ice breakers Taimyr and Murman took four polar explorers off the station close to the eastern coast of Greenland. They arrived in Leningrad on 15 March on board the icebreaker Yermak. The expedition members, hydrobiologist Pyotr Shirshov, geophysicist Yevgeny Fyodorov, radioman Ernst Krenkel, and the commander Ivan Papanin, were awarded the Hero of the Soviet Union title.