1951 Sc 1542(2) Alexander M. Butlerov Scott 1568

1951. Alexander M. Butlerov.
Raster: Horizontal.
Catalogs: Scott 1568, Standard Collection 1542(2), Michel 1582.
Issued on: 1951.
Perforation: line 12½.
Printing: Photogravure.
Face value: 40 Russian kopek.