1975 SC 4422-4423 Soyuz and Apollo. Scott 4339-4340

1975. “Soyuz” and “Apollo”.
Catalog numbers: Scott 4339-4340, Standard Collection 4422-4423, Michel 4372-4373, Yvert 4158-4159.
Issued on: July 15, 1975.
Perforation: comb 11¾.
Printing: Offset lithography.
Size: 65 x 32.5 mm.
Colors: Multicolor.
Face value: 2*12 Russian kopek.
Quantity: 6,700,000; 6,700,000.