1957 Sc 1934 A.M.Lyapunov Scott 1951

1957. A.M.Lyapunov.
Catalog numbers: Scott 1951, Standard Collection 1934, Mi 1955, Yt 1934.
Issued on: June 20, 1957.
Perforation: line 12¼.
Printing: Photogravure.
Colors: Multicolor.
Face value: 40 Russian kopek.
Quantity: 1,000,000.