Awesome partial ink error on this old 1916 era envelope for use by the Harvard Traveller's Club.  Mint and crisp and ready for your collection!

History: A postage stamp error is any of several types of failure in the stamp printing process that results in stamps not having the intended appearance. Errors include use of the wrong colors, wrong denominations, missing parts of the design, misplaced or inverted design elements, etc. The term "error" is typically reserved for obvious failures in the production process that (potentially) replicate over many stamps, while unique errors or poor quality are known as "freaks" or "oddities".

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