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Highway Post Office Covers - 1st and 2nd Trips made on November 13, 2025 from
Boston, Massachusetts to Newport, Rhode Island.
Highway Post Offices (HPOs) were added as an additional service
to the Railway Post Offices in 1940. This service was provided through June of
1974. There were 410 postal routes covered by the HPO. By 1950 there were only
22 HPO routes left in operation.
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