1981 Sc 5109 BL 153 20th Anniversary of First Manned Space Flight Scott 4928

1981. 20th Anniversary of First Manned Space Flight.
Catalog numbers: Scott 4928, Standard Collection 5109 BL 153, Michel BL 150, Yvert BF 150.
Condition: MNHOG.
Issued on: April 12, 1981.
Format: Souvenir Sheet.
Perforation: comb 11½ x 12.
Printing: Photogravure.
Size: 100 x 60 mm.
Colors: Multicolor.
Face value: 50 Russian kopek.
Quantity: 800,000.