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Letter Rate 4¢ Package Rate 4¢ Postcard Rate 3¢ Effective 8/1/1958 American President Dwight D Eisenhower (1/20/1953-1/20/1961) Argentine President Arturo Frondizi (5/1/1958-3/29/1962) Australian Prime Minister Robert Menzies (12/19/1949-1/26/1966) Austrian President Adolf Schärf (5/22/1957-2/28/1965) Bahamian Chief Minister Roland Symonette (1/1/1955-1/7/1964) Belgian Prime Minister Gaston Eyskens (6/26/1958-4/25/1961) Brazilian President Juscelino Kubitschek (1/31/1956-1/30/1961) British Prime Minister Harold Macmillan (1/10/1957-10/18/1963) Canadian Prime Minister John Diefenbaker (6/21/1957-4/22/1963) East German President Wilhelm Pieck (10/11/1949-9/7/1960) German President Theodor Heuss (9/12/1949-9/12/1959) Japanese Prime Minister Nobusuke Kishi (2/25/1957-7/19/1960)