1946 Sc 954-955 125th Birth Anniversary of Pafnuty Chebyshev Scott 1050-1051

1946. 125th Birth Anniversary of Pafnuty Chebyshev.
Catalog numbers: Scott 1050-1051, Standard Collection 954-955, Michel 1023-1024, Yvert 1049-1050.
Issued on: May 25, 1946.
Perforation: line 12½.
Printing: Photogravure.
Size: 26 x 37 mm.
Color: Brown; black grey.
Face value: 30 Russian kopek; 60 Russian kopek.
Quantity: 5,000,000; 3,000,000.