1979 Sc 4880-4884 Summer Olympics 1980 (IX) Scott B85-B89

1979. Summer Olympics 1980 (IX).
Catalogs: Scott B85-B89, Standard Collection 4880-4884, Michel 4830-4834, Yt 4585-4589.
Issued on: March 21, 1979.
Perforation: comb 12 x 12½.
Printing: Offset lithography.
Size: 31 x 43 mm.
Colors: Multicolor.
Face value: 4+2 Russian kopek; 6+3 Russian kopek; 10+5 Russian kopek; 16+6 Russian kopek; 20+10 Russian kopek.
Quantity: 6,000,000; 6,000,000; 6,000,000; 4,500,000; 1,200,000.