1990 Sc 6099-6101 Nature Conservation Scott 5851-5853

1990. Nature Conservation.
Catalogs: Scott 5851-5853, Standard Collection 6099-6101, Michel 6043-6045, Yt 5705-5707.
Issued on: January 08, 1990.
Perforation: comb 11½.
Printing: Photogravure.
Size: 28 x 40 mm.
Colors: Multicolor.
Face value: 10 Russian kopek; 15 Russian kopek; 20 Russian kopek.
Quantity: 5,000,000; 4,500,000; 3,200,000.