1974 Sc 4331 BL 100. 3rd All-Union Philatelic Society Congress. Scott 4245

1974. 3rd All-Union Philatelic Society Congress.
Catalogs: Scott 4245, Standard Collection 4331 BL 100, Michel BL 97, Yt BF 96.
Issued on: 1974-09-04.
Perforation: frame 12 x 12½
Printing: Offset lithography
Size: 110 x 70 mm
Colors: Multicolor
Face value: 50 Russian kopek
Print run: 400,000