This set includes a first day of issue postal cachet and 39mm sterling silver proof medal enclosed in a special leatherette display wallet. Certified July 1, 1971. On this date, the Post Office reached a historic landmark when it ceased operation as a governmental function and became a service industry. President Richard Nixon appointed Winton M. Blount as the first Postmaster General of the U. S. Postal Service and Chairman of its Board of Governors.
To commemorate the inauguration of the new United States Postal Service, the National Association of Postmasters of the United States and the National League of Postmasters issued this sterling silver commemorative medal in combination with a pair of historic stamp cancellations. The silver medal weighs about 26 grams.
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