1968 Sc 3583-3584. Day of a stamp and collector. Week of the letter. Scott 3508-3509

1968. Day of a stamp and collector. Week of the letter
Catalogs: Scott 3508-3509, Standard Collection 3583-3584, Michel 3533-3534, Yt 3402-3403.
Issued on: 1968-09-16.
Perforation: comb 11½
Printing: Photogravure
Size: 40 x 28 mm
Colors: Multicolor
Face value: 4 Russian kopek
Print run: 4,000,000