1976 Sc 4518. 50th Anniversary of International Philatelic Federation. Scott 4435

1976. 50th Anniversary of International Philatelic Federation.
Catalogs: Scott 4435, Standard Collection 4518, Michel 4468, Yt 4247.
Issued on: 1976-05-12.
Perforation: comb 11½
Printing: Photogravure
Size: 28 x 40 mm
Colors: Red-purple, purple-blue
Face value: 6 Russian kopek
Print run: 3,900,000