The centennial of the Pledge of Allegiance was honored on a 29-cent stamp issued by the US Postal Service on September 8, 1992, in Rome, New York.
The Pledge of Allegiance was first recited by school children in 1892 to commemorate the 400th anniversary of the discovery of America. Written that year by Francis Bellamy and then published in "The Youth's Companion," the original text has been altered twice. In 1924, the words "the flag of the United States" were substituted for "my flag," and in 1954 Congress added the words "under God." The pledge was officially adopted by the United States in 1942.
Designed by Lou Nolan, the stamps were printed on the photogravure press by the Bureau of Engraving and Printing. The definitive size Pledge of Allegiance stamp was available in both a ten-stamp and a twenty-stamp booklet.
Postal Bulletin (August 6, 1992).