1971 SC 3964-3968 Marine Mammals Scott 3882-3886

1971. Marine Mammals.
Catalogs: Scott 3882-3886, Standard Collection 3964-3968, Mi 3913-3917, Yt 3747-3751.
Condition: MNHOG.
Issued on: August 17, 1971.
Perforation: comb 11½.
Printing: Photogravure and Recess.
Size: 40 x 28 mm.
Colors: Multicolor.
Face value: 4 Russian kopek; 6 Russian kopek; 10 Russian kopek; 12 Russian kopek; 14 Russian kopek.
Quantity: 4,100,000; 4,100,000; 4,000,000; 4,000,000; 3,500,000.