Filigranology
Filigranology is the study of watermarks. It is usually pursued in order to discover information about the date and origin for a paper based piece of written work or a piece of art. There are several catalogues of watermarks - most notably C. M. Briquet's, Les Filigranes (1907) - including illustrations of many watermarks from dated documents to aid those wishing to undertake this kind of research.[1]
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