1981 Sc 5121-5123 Interkosmos Scott 4940-4942

1981. Interkosmos.
Catalog numbers: Scott 4940-4942, Standard Collection 5121-5123, Michel 5071-5073, Yvert 4813-4815.
Condition: MNHOG.
Issued on: May 16, 1981.
Perforation: comb 12 x 12¼.
Printing: Offset lithography.
Size: 38 x 53 mm.
Colors: Multicolor.
Face value: 6 Russian kopek; 15 Russian kopek; 32 Russian kopek.
Quantity: 6,300,000; 5,300,000; 4,400,000.