1965 Sc 3094 20th Anniversary of Polish-Soviet friendship Scott 3018

1965. 20th Anniversary of Polish-Soviet friendship.
Catalog numbers: Scott 3018, Standard Collection 3094, Michel 3037, Yvert 2934.
Condition: MNHOG.
Issued on: April 10, 1965.
Perforation: comb 12½.
Printing: Photogravure.
Size: 32.5 x 32.5 mm.
Colors: Ochre brown, red.
Face value: 6 Russian kopek.
Quantity: 3,000,000.