1990 Sc 6174-6178 Prehistoric Animals Scott 5920-5924

1990. Prehistoric Animals.
Catalogs: Scott 5920-5924, Standard Collection 6174-6178, Michel 6116-6120, Yt 5780-5784.
Issued on: August 15, 1990.
Perforation: comb 11¾ x 12; comb 12 x 11¾.
Printing: Offset lithography.
Size: 58 x 26 mm; 26 x 58 mm.
Colors: Multicolor.
Face value: 1 Russian kopek; 3 Russian kopek; 5 Russian kopek; 10 Russian kopek; 20 Russian kopek.