1973 Sc 4187-4191. Animals from Nature Reserves. Scott 4093-4097

1973. Animals from Nature Reserves.
Catalogs: Scott 4093-4097, Standard Collection 4187-4191, Michel 4137-4141, Yt 3945-3949.
Issued on: 1973-07-26.
Perforation: comb 11¼
Printing: Photogravure
Size: 50 x 50 mm
Colors: Multicolor
Face value: 1 Russian kopek; 3 Russian kopek; 4 Russian kopek; 6 Russian kopek; 10 Russian kopek
Print run: 7,100,000; 6,900,000; 6,600,000; 6,100,000; 5,600,000