Term used by commercial potteries fo the mark printed on the underside of their wares.
The term used for the mark printed by potteries on the underside of pottery and porcelain to denote the makers name, pattern, style, date, etc.Found on http://www.antique-marks.com/antique-terms-b.html
In philately a backstamp is a postmark on the back of a letter showing a post office or station through which the item passed in transit. The office of delivery may also backstamp a cover and this type of mark is known as a receiving mark. Backstamps are often applied as documentation of transit times, lengthy ones in the case of ocean crossings o...Found on http://en.wikipedia.org/wiki/Backstamp
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