Factory mark

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20th century Jingdezhen ware, with factory mark: 中国景德镇 ("China Jingdezhen") and MADE IN CHINA in English.

A factory mark is a symbolic marking afixed by manufacturers on their productions in order to authentify them. Numerous factory marks are known throughout the ages, and are essential in determining the provenance or dating of productions.

Factory mark are essential in the area of porcelain production especially, where they are sometimes also called "backstamps", and where their absence would make authentification much more difficult.[1]