The program of international cooperation in the exploration and use of outer space "Intercosmos". Artificial Earth satellite "Interkosmos-10", launched in October 1973 in order to comprehensively study the Association of the magnetosphere and ionosphere, on the background of the Earth. Soviet spaceship "Soyuz-19" and American "Apollo" before joining. Text: "International cooperation in space."
On the stamp - the first Soviet artificial Earth satellite (launched 04.10.1957) and the ribbon with the text "XX years of the space age". The pictures on the background of cosmic scenery.