1969 Sc 3654-3656. Day of astronautics. Scott 3578-3580

1969. Day of astronautics.
Catalogs: Scott 3578-3580, Standard Collection 3654-3656, Michel 3605-3607, Yt 3478-3480.
Issued on: 1969-04-12.
Perforation: comb 12 x 12½
Printing: Offset lithography
Size: 37 x 52 mm; 52 x 37 mm
Colors: Multicolor
Face value: 10 Russian kopek
Print run: 4,000,000; 7,000,000; 4,000,000.