49-star Flag 4-cent 1959 issue U.S. stamp. The change of design in the flag came about because of the accession of Alaska to statehood on January 3, 1959.
Bureau of Engraving and Printing. Designed by Stevan Dohanos.
U.S. Postal Service; National Postal Museum: <a rel="nofollow" class="external text" href="http://arago.si.edu/category_2032822.html">49-star Flag Issue</a>