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Glossary: K



Killer Postmark - any postmark that makes re-use of a stamp impossible

Kiss prints - marks that occur on sheet-fed presses when the paper accidentally contacts the inked plate before or after printing the stamps. As a rule, only a few marginal stamps will show the 'kiss'.

Knife - the cutting edge or 'cookie cutter', as philatelists refer to it, of the machine which cuts the envelope blank. Also the die-cut paper from which envelopes are folded.

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Glossary: K | National Postal Museum

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