1974 Sc 4345-4346 Soviet Space Exploration Scott 4256-4257

1974. Soviet Space Exploration.
Catalogs: Scott 4256-4257, Standard Collection 4345-4346, Mi 4295-4296, Yt 4090-4091.
Condition: MNHOG.
Issued on: October 28, 1974.
Perforation: comb 11½.
Printing: Photogravure.
Size: 28 x 40 mm; 37 x 52 mm.
Colors: Multicolor.
Face value: 2*10 Russian kopek.
Quantity: 5,500,000; 5,100,000.