epgorge
Posts: 2422
Joined: 12/29/2006 Status: offline
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And David gies credit to Bill Lindsey's sight. "Many bottles carry only a number (or numbers) on the base. These marks usually served as some type of mold identification, indicating a particular mold used by a glass factory. If a number of identical molds were produced for making a certain type of bottle, they would often be serially numbered (such as 1 to 12). Some numbers served as date codes, or as some other type of internal code used by the factory. In the majority of cases, bottles with only numbers on the base are difficult to attribute to a specific glassmaker, although sometimes other characteristics of a bottle will give clues to it's origin. For a very informative, comprehensive site with lots of detailed discussion on various aspects of antique bottles, their methods of manufacture, uses, and clues to dating them, I encourage you to check out Bill Lindsey's Historic Glass Bottle Identification and Information Website . His site is a "work in progress", and already has a wealth of very good information posted. "
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