page_title: Postmark
section_title: Similar marks
hierarchical_section_title: Postmark / Similar marks
caption_attribution_description: English: New York-London leg of cover carried around the world (New York-Shediac-Botwood-Foynes-Southampton-Cairo-Karachi-Singapore-Hong Kong-Manila-Guam-Wake I.-Midway I.-Honolulu-San Francisco-New York) via PAA (Boeing 314 Clipper) and Imperial Airways (Short S23) including FAM 18 (Northern Route) First Flight, June 24 - July 28, 1939
context_page_description: A postmark is a postal marking made on a letter, package, postcard or the like indicating the date and time that the item was delivered into the care of the postal service. Modern postmarks are often applied simultaneously with the cancellation or killer that marks the postage stamp as having been used, and the two terms are often used interchangeably, if incorrectly. Postmarks may be applied by hand or by machines, using methods such as rollers or inkjets, while digital postmarks are a recent innovation. The local post Hawai'i Post had a rubber-stamp postmark, parts of which were hand-painted. At Hideaway Island, Vanuatu, the Underwater Post Office has an embossed postmark.
context_section_description: A postmark shouldn't be confused with the killer which are lines, bars, etc. used to cancel a postage stamp.  Neither should a postmark be confused with overprints generally, or pre-cancels (stamps that have been cancelled before the envelope or package to which they are affixed is submitted or deposited for acceptance into the mailstream, they most commonly have taken the form of a pre-printed city name on the stamp) specifically, which generally do not indicate a date.
  Flight cachets, more or less elaborate rubber-stamps on an envelope indicating on which flight (typically a first flight), a first flight cover has traveled via airmail, are in addition to the postmark and are not postmarks either.
  The visitor centers at U.S. national parks also have a postmark-like inked rubber stamp available to stamp into a book of park stamps (the "Passport to Your National Parks") or a postcard, or any piece of paper. This is set to stamp the day's date in the middle and the park's name and location around the edge like many postmarks, though it is not used for postage purposes.
caption: 1939 Around the World flight with red flight cachet
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