1977 Sc 4673-4678 History of Russian Aircraft Scott C109-C114

1977. History of Russian Aircraft.
Catalogs: Scott C109-C114, Standard Collection 4673-4678, Michel 4621-4626, Yt PA124-PA129.
Issued on: August 16, 1977.
Perforation: comb 12 x 11½.
Printing: Lithographed and engraved.
Size: 38 x 53 mm.
Colors: Multicolor.
Face value: 4 Russian kopek; 6 Russian kopek; 10 Russian kopek; 12 Russian kopek; 16 Russian kopek; 20 Russian kopek.
Quantity: 7,200,000; 6,100,000; 5,600,000; 5,100,000; 4,400,000; 4,100,000.