Postage stamps of the USSR

March 1975. USSR. Moscow. A 10-kopek postage stamp with portraits of cosmonauts Alexei Alexandrovich Gubarev and Georgy Mikhailovich Grechko (from left to right), issued by the USSR Ministry of Communications in honor of their flight on the Soyuz-17 spacecraft to the Salyut-4 orbital space station from January 10 to February 9, 1975. The exact date of the photo is unknown. Valentin Khukhlaev/TASS