1956 Sc 1864 Soviet Scientific Antarctic Expedition Scott 1884

1956. Soviet Scientific Antarctic Expedition.
Catalog numbers: Scott 1884, Standard Collection 1864, Michel 1891, Yvert 1861.
Issued on: October 22, 1956.
Perforation: comb 12 x 12½.
Printing: Offset lithography.
Size: 30 x 42 mm.
Color: Multicolor.
Face value: 40 Russian kopek.
Quantity: 3,000,000.