1959 Sc 2277-2278 Week of the letter. Scott 2239-2240

1959. Week of the letter.
Catalog numbers: Scott 2239-2240, Standard Collection 2277-2278, Michel 2268-2269, Yvert 2224-2225.
Perforation: comb 12 x 12½.

Colors: Lilac and black. Dark blue and black.
Printing: Offset. Comb perf.

Print run: 3,000,000.