1963 Sc 2851. 90 anniversary since the birth of Yu.M.Steklov. Scott 2812

1963. To the 90 anniversary since the birth of Yu.M.Steklov.
Catalog numbers: Scott 2812, Standard Collection 2851, Michel 2828, Yvert 2744.
Perforation: comb 12 x 11½.
Color: Dark-brown.
Printing: Recess.
Print run: 3,000,000.