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  2. List of United States airmail stamps - Wikipedia

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

    Domestic air mail became obsolete in 1975, and international air mail [2] in 1995, when the USPS began transporting First Class mail by air on a routine basis. [ 3 ] [ 4 ] All post-1977 United States stamp images are copyright of USPS .

  3. Flats (USPS) - Wikipedia

    en.wikipedia.org/wiki/Flats_(USPS)

    To fit the definition a flat must: Have one dimension that is greater than 6-1/8 inches high OR 11-½ inches long (the side parallel to the address as read) OR ¼ inch thick.

  4. United States airmail service - Wikipedia

    en.wikipedia.org/wiki/United_States_airmail_service

    The first official experiment at flying air mail to be made under the aegis of the United States Post Office Department took place on September 23, 1911, on the first day of an International Air Meet sponsored by The Nassau Aviation Corporation of Long Island, when pilot Earle L. Ovington flew 640 letters and 1,280 postcards from the Aero Club of New York's airfield located on Nassau Boulevard ...

  5. MeadWestvaco - Wikipedia

    en.wikipedia.org/wiki/MeadWestvaco

    In March 1920, the Mead Fibre Company was created to take over operations of the Kingsport Pulp Corporation in Kingsport, Tennessee. [14] [15] In 1921, the Mead Sales Company was formed to sell the Mead Paper Company's projects. [16] In 1928, the Mead Paperboard Corporation was formed to operate mills in Virginia, South Carolina and Tennessee. [16]

  6. Airmail etiquette - Wikipedia

    en.wikipedia.org/wiki/Airmail_etiquette

    The airmail etiquette may be omitted if airmail stamps are used on the letter, and in some cases even this is not necessary if a country sends out all its foreign mail by air. In some regions, such as the United Kingdom , one may simply write "PAR AVION -- BY AIR MAIL" on the envelope, [ 1 ] even though etiquettes are available free of charge ...

  7. Postage stamps and postal history of the United States

    en.wikipedia.org/wiki/Postage_stamps_and_postal...

    Airmail in the United States Post Office emerged in three stages beginning with the 'pioneer period' [57] where there were many unofficial flights carrying the mail prior to 1918, the year the US Post Office assumed delivery of all Air Mail. The US Post office began contracting out to the private sector to carry the mail (Contract Air Mail, CAM ...

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