1972 Sc 4037 15th Soviet Trade Unions Congress Scott 3952

1972. 15th Soviet Trade Unions Congress.
Catalogs: Scott 3952, Standard Collection 4037, Mi 3987, Yt 3814.
Condition: MNHOG.
Issued on: February 29, 1972.
Perforation: comb 12 x 12½.
Printing: Photogravure.
Size: 30 x 42 mm.
Colors: Multicolor.
Face value: 4 Russian kopek.
Quantity: 2,900,000.