Not a series but a combined collection of stamps honoring statehood anniversaries.
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Letter Rate 3¢ Package Rate 3¢ Postcard Rate 1¢ Effective 7/6/1932 Hungary 7/5/1946 Bikini Introduced French designer Louis Réard shows off his design of a daring two-piece swimsuit at the Piscine Molitor, a swimming pool in Paris. American President Harry S Truman (4/12/1945-1/20/1953) British Prime Minister Clement Attlee (7/26/1945-10/26/1951)