Special Philatelic Cancellation at NMAH P.O
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PrintA special philatelic cancellation is used on letters sent out of the National Museum of American History Post Office that commemorates the opening date of the National Philatelic Collection exhibit highlighting the introduction of Rural Free Delivery.
Chronology of Smithsonian History
Smithsonian Institution Archives, Record Unit 371, Box 5, "The Torch," April 1986, p. 2.
Institutional History Division, Smithsonian Institution Archives, 600 Maryland Avenue, S.W., Washington, D.C. 20024-2520, SIHistory@si.edu
April 11, 1986