1964 Sc 2926-2928 Cosmonautics Day Scott 2883-2884, 2889

1964. Cosmonautics Day.
Catalog numbers: Scott 2883-2884, 2889, Standard Collection 2926-2928, Michel 2895A-2897A, Yvert 2802-2803, 2808.
Condition: MNHOG.
Issued on: April 12, 1964.
Perforation: comb 11½.
Printing: Photogravure.
Size: 40 x 28 mm.
Colors: Multicolor.
Face value: 4 Russian kopek; 6 Russian kopek; 12 Russian kopek.
Quantity: 5,500,000; 4,500,000; 4,500,000.