1963 Sc 2830. 250th Birth Anniversary of Denis Diderot. Scott 2784

1963. 250th Birth Anniversary of Denis Diderot.
Catalog numbers: Scott 2784, Standard Collection 2830, Michel 2809, Yvert 2721.
Perforation: comb 11½.
Color: Gray-dark blue, brown and light-olive.
Printing: Photogravure.
Print run: 3,000,000.