1976 Sc 4564. Space Flight of “Soyuz-21”. Scott 4475

1975. Space Flight of “Soyuz-21”.
Catalogs: Scott 4475, Standard Collection 4564, Michel 4514, Yt 4282.
Issued on: 1976-09-08.
Perforation: comb 12 x 11½
Printing: Photogravure
Size: 55.5 x 26 mm
Colors: Multicolor
Face value: 10 Russian kopek
Print run: 5,000,000