1964 Sc 2980 20th Anniversary of Polish People’s Republic Scott 2900

1964. 20th Anniversary of Polish People’s Republic.
Catalog numbers: Scott 2900, Standard Collection 2980, Michel 2931, Yvert 2829.
Condition: MNHOG.
Issued on: July 16, 1964.
Perforation: comb 12½.
Printing: Offset lithography.
Size: 32.5 x 32.5 mm.
Colors: Multicolor.
Face value: 6 Russian kopek.
Quantity: 3,000,000.