1956 Sc 1799 Death Centenary of Nikolay Lobachevsky Scott 1822

1956. Death Centenary of Nikolay Lobachevsky.
Catalog numbers: Scott 1822, Standard Collection 1799, Michel 1830, Yvert 1807.
Issued on: June 14, 1956.
Perforation: line 12¼.
Printing: Photogravure.
Size: 26 x 36 mm.
Color: Multicolor.
Face value: 40 Russian kopek.
Quantity: 2,000,000.