1964 Sc 2936-2937 Soviet Stratonauts Scott 2888, 2888imp

1964. Soviet Stratonauts.
Catalog numbers: Scott 2888, 2888imp, Standard Collection 2936-2937, Michel 2901A-2901B.
Condition: MNHOG.
Issued on: April 12, 1964.
Perforation: comb 11½; imperforated.
Printing: Photogravure.
Size: 28 x 40 mm.
Colors: Multicolor.
Face value: 2*10 Russian kopek.
Quantity: 3,000,000; 1,000,000.