1964 Sc 3013. Week of the letter. Scott 2940

1964. Week of the letter
Catalog numbers: Scott 2940, Standard Collection 3013, Michel 2959, Yvert 2861.
Perforation: comb 12½ x 12
Color: Gray-brown, blue and pink.
Printing: Offset lithography.
Print run: 4,000,000.