The Department issued this 4-cent stamp in honor of the 10th of the signing of the North Atlantic Treaty, through the Washington, DC, post office on April 4, 1959.
Designed by Stevan Dohanos, the stamp features the North Atlantic Treaty Organization's emblem and motto. The four-pointed star appears to the left, superimposed on a solid dark circle. In the upper right portion of the design is "NATO" with the years "1949 —1959" in smaller white Roman letters directly below. The value "4c," in white Roman, appears in the lower right portion of the design. Across the top, against a plain background, is the motto "United For Freedom," and across the bottom is the inscription "United States Postage." Except for the denomination and the dates "1949 — 1959," all lettering is in dark Roman.
The stamp was printed by the rotary process, electric-eye perforated, and issued in panes of seventy stamps each. An initial printing of 120 million stamps was authorized.
Postal Bulletin (February 26, 1959)