1955 Sc 1544I Alexander O. Kovalevsky Scott 1569

1955. Alexander O. Kovalevsky.
Catalogs: Scott 1569, Standard Collection 1544I, Michel 1579.
Height: 32 mm.
Issued on: 1955.
Perforation: line 12½.
Printing: Photogravure.
Raster: square.
Face value: 40 Russian kopek.