Indicium

An indicium (plural: indicia) is the stamplike image on postal stationery. If cut out from stationery, it can appear to be some kind of imperf, one that will not be listed in stamp catalogs. However, thesecan be distinguished by being on thin or medium card (postal cards and lettercards), thinner than normal paper (newspaper wrappers and aerogrammes) or being on colored papers not listed in catalogs (envelopes and aerogrammes).  file:Greece postal card cut sq.jpg|Indicium from a 15 lepta Greek postal card as part of a cut square 

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