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  2. U.S. space exploration history on U.S. stamps - Wikipedia

    en.wikipedia.org/wiki/U.S._space_exploration...

    The Post Office Department honored this first orbital flight of a United States astronaut on February 20, 1962, when it released the Project Mercury commemorative stamp, placed on sale throughout the country at the exact hour Colonel John Glenn's historic flight officially had returned to Earth safely.

  3. US Regular Issues of 1922–1931 - Wikipedia

    en.wikipedia.org/wiki/US_Regular_Issues_of_1922...

    The Regular Issues of 1922–1931 were a series of 27 U.S. postage stamps issued for general everyday use by the U.S. Post Office. Unlike the definitives previously in use, which presented only a Washington or Franklin image, each of these definitive stamps depicted a different president or other subject, with Washington and Franklin each confined to a single denomination.

  4. List of United States airmail stamps - Wikipedia

    en.wikipedia.org/wiki/List_of_United_States...

    [3] [4] All post-1977 United States stamp images are copyright of USPS. [5] Scott cataloged stamps received a "C" designation for airmail issues beginning in 1940. Designated for international mail, and showing a small airplane, the January, 2012 $1.05 Scenic America series issue was designated C150.

  5. Postage stamp demonetization - Wikipedia

    en.wikipedia.org/wiki/Postage_stamp_demonetization

    1935 New Zealand Post Office stamp demonitization notice. The demonetization of postage and revenue stamps is the process by which the stamps are rendered no longer valid. In general, stamp demonetization is a rare event, since any unused stamp is effectively equivalent to its face value, and there is no financial disadvantage if postal customers use old stamps on their mail.

  6. Washington–Franklin Issues - Wikipedia

    en.wikipedia.org/wiki/Washington–Franklin_Issues

    Rarest of all are the 4-cent and 8-cent stamps, which, in fact, were never released for postal use; apparently, they reached the public in 1915 when the Post Office traded them to stamp dealers in exchange for rare issues missing from the Smithsonian Institution collection of U.S. stamps. [11]

  7. Postage stamp - Wikipedia

    en.wikipedia.org/wiki/Postage_stamp

    The first stamp issue to be officially perforated, the 3-cent George Washington, was issued by the United States Post Office on 24 February 1857. Between 1857 and 1861, all stamps originally issued between 1851 and 1856 were reissued with perforations.

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