An exhibition examining the United States Postal Inspection Service, its history and work.
This museum is on the lower level of the historic City Post Office Building, which served as the District post office from 1914 to 1986. In addition to having one of the world's largest collections of stamps and philatelic materials, the museum has postal history material that predates stamps, vehicles used to transport mail, mailboxes, mailbags, postal uniforms and equipment.
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