The size is 6 ¼" x 4 ½", postally unused, published by the Ministry of Communications of the USSR, circulation unknown. The obverse features rather disturbing artwork showing several Soviet satellites swarming around a sickly-green Earth, with symbols of the might of Soviet industry and science seen through an equally unhealthy pink mist. The artist's name, R. Strelnikov, is printed on the bottom flap of the verso. The government pre-printed postal stamp and the special-issue commemorative stamp are cancelled by a First Day stamp issued by the Moscow Post Office and dated 12 April 1977. The twelfth of April, the date of Gagarin's space flight, is an official holiday celebrated in the former Soviet Union and some other post-Soviet states.

In excellent condition. The First Day cancel was stamped rather hard and is showing in relief on the verso, but this is not really detractive. There is no other significant wear.