1973 Sc 4250 I.G.Petrovsky Commemoration Scott 4154

1973. I.G.Petrovsky Commemoration.
Catalogs: Scott 4154, Standard Collection 4250, Mi 4200, Yt 4003.
Condition: MNHOG.
Issued on: December 28, 1973.
Perforation: comb 11½ x 12.
Printing: Photogravure.
Size: 26 x 37 mm.
Colors: Multicolor.
Face value: 4 Russian kopek.
Quantity: 3,750,000.