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Walbridge, Cecil Munsey, Roger Peters, Gene Blasi, Adeline Pepper, Arthur G. This site also utilizes, to some degree, my own research and observations over several years of collecting & studying antique bottles, insulators and other glassware. It has been increasingly more difficult to keep up with answering emails and posts concerning glass bottle markings and related information. In about 40 to 50 percent of the cases, after I answer a query by email, I do not receive the slightest reply or acknowledgement, not even a brief “thank you”.I hope this list will be of assistance to those interested in antique bottles and other glass containers made in the United States and the history behind the factories that manufactured them. (I believe Because of this I am going to have to stop answering all but questions of the very widest interest to the collecting public.Often, I simply don’t know the answers to a lot of questions that are sent to me.The wide world of glass and bottle collecting is a TREMENDOUS field and there are many, many unanswered questions still out there concerning bottle markings, bottle manufacturers’ histories, etc.This list primarily includes marks that represent the actual glass company that made the container.Many marks are encountered that indicate the company whose product was contained within it, or are trademarks (“brand names”) that give no indication of who actually made the glass, and those are (with quite a few exceptions) , not included in my list.

be a glass manufacturer’s mark and so may not be listed here. Many bottles carry only a number (or numbers) on the base. Thanks Hello Nicholas, "Duraglas - This was the proprietary name for a process used by the Owens-Illinois Glass Company where the surface of the hot, just produced bottles, were sprayed on the body, shoulder, and neck (not base or the top of the finish) with a stannic chloride vapor that allowed the tin to bond to the outer surface and providing scratch resistance and durability to the bottles. The photo to the right (click to enlarge) is of a 1951 beer bottle with the Duraglas notation in the lower portion of the base embossing. I know its not really that old just a little curious about some more info on it.This is very frequently the case, especially with soda, mineral water, beer and other bottles of the 1880-1930 period, in which the initial(s) of the “end user” (such as the bottler, brewery, drug manufacturer, or other firm for which the bottle was made) appear embossed on the base. initials of early glass companies) may vary slightly in appearance and punctuation from one bottle to another. These marks usually served as some type of mold identification, indicating a particular mold used by a glass factory.For instance, they sometimes occur with or without periods after each letter. 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).

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