1975 Sc 4440 European Security and Co-operation Conference Scott 4356

1975. European Security and Co-operation Conference.
Catalogs: Scott 4356, Standard Collection 4440, Mi 4390Zf, Yt 4173.
Condition: MNHOG.
Issued on: August 18, 1975.
Perforation: frame 11½.
Printing: Photogravure.
Size: 28 x 40 mm.
Colors: Multicolor.
Face value: 6 Russian kopek.
Quantity: 4,200,000.