1956 Sc 1794a Ivan Kulibin Scott 1804

1956. Ivan Kulibin. White background variety.
Catalog numbers: Scott 1804, Standard Collection 1794a, Michel 1825, Yvert 1802.
Issued on: May 12, 1956.
Perforation: comb 12 x 12½.
Printing: Offset lithography.
Color: Multicolor.
Face value: 40 Russian kopek.