A dummy stamp is a stamp-like label which is not valid for postal use. Dummy stamps are a form of cinderella stamp and the two principal types are test or training stamps, used to test postal equipment or train postal workers, and printer's sample stamps created to promote or demonstrate the printing capabilities of a stamp printer.
A dummy stamp is a stamp-like label which is not valid for postal use. Dummy stamps are a form of cinderella stamp and the two principal types are test or training stamps, used to test postal equipment or train postal workers, and printer's sample stamps created to promote or demonstrate the printing capabilities of a stamp printer.
Source: Wikipedia "Dummy stamp" · CC BY-SA 4.0
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