1973 Sc 4226 Bicentenary of Leningrad Mining Institute Scott 4126

1973. Bicentenary of Leningrad Mining Institute.
Catalogs: Scott 4126, Standard Collection 4226, Mi 4169, Yt 3976.
Condition: MNHOG.
Issued on: October 3, 1973.
Perforation: comb 11½.
Printing: Photogravure and Recess.
Size: 40 x 28 mm.
Colors: Multicolor.
Face value: 4 Russian kopek.
Quantity: 3,000,000.