1974 Sc 4344. Soviet Space Exploration. Scott 4255

1974. Soviet Space Exploration.
Catalog numbers: Scott 4255, Standard Collection 4344, Michel 4294, Yvert 4089.
Issued on: October 28, 1974.
Perforation: comb 12 x 11½.
Printing: Photogravure.
Size: 37 x 52 mm.
Colors: Multicolor.
Face value: 6 Russian kopek.
Quantity: 5,600,000.