1974 Sc 4335-4337. 100 th anniversary of the Universal Postal Union. Scott 4248-4250

1974. 100 th anniversary of the Universal Postal Union.
Catalogs: Scott 4248-4250, Standard Collection 4335-4337, Michel 4285-4287, Yt 4083-4085.
Issued on: 1974-10-08.
Perforation: comb 12 x 11½
Printing: Photogravure and Recess
Size: 38 x 53 mm; 37 x 52 mm
Colors: Multicolor
Face value: 10 Russian kopek
Print run: 3,100,000; 3,300,000; 3,700,000