1971 SC 3910-3913 BL 71 Soviet Moon Exploration Scott 3837A

1971. Soviet Moon Exploration.
Catalogs: Scott 3837A, Standard Collection 3910-3913 BL 71, Mi BL 68, Yt BF 67.
Condition: MNHOG.
Issued on: March 16, 1971.
Format: Souvenir Sheet.
Perforation: frame 12 x 11½.
Printing: Photogravure.
Size: 93 x 72 mm.
Colors: Multicolor.
Face value: 50 Russian kopek.
Quantity: 1,000,000.