1979 Sc 4906-4910 Summer Olympics 1980 (X) Scott B91-B95

1979. Summer Olympics 1980 (X).
Catalogs: Scott B91-B95, Standard Collection 4906-4910, Michel 4856-4860, Yt 4604-4608.
Issued on: June 20, 1979.
Perforation: comb 12½ x 12; comb 12 x 12½.
Printing: Offset lithography.
Size: 43 x 31 mm; 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.