1938 Sc 486 Soviet flag on North pole Scott 628

1938. Soviet flag on North pole.
Catalogs: Scott 628, Standard Collection 486, Michel 587.
Issued on: February 25, 1938.
Perforation: comb12¼ x 11¾.
Printing: Typography.
Colors: Multicolor.
Face value: 80 Russian kopek.
Quantity: 6,000,000.