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You see, THOUSANDS of bottles carry nothing but a number on the base (or heel) , and this information (in most cases) does not help ID the source or age………nearly all glass factories used mold numbers on their containers at one time or another.
However, the general style, shape and glass color of a container can give strong clues to approximate age. Guetig, Conrad Selle, Tod Von Mechow, Don Dzuro, Johnnie W. Paquette, Bill Lindsey, Carol Serr, Mark Newton, and Lee Brewer, as well as many others.
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.
From the standpoint of most collectors of antique bottles, the name and location of the company the bottle was made for, and the name of the product that was originally contained in the bottle (one or both of which may be embossed on the bottle) is often considered to be of more interest or importance than the glass factory where the bottle was actually manufactured.
This list primarily includes marks that represent the actual glass company that made the container.
They have since changed the formula, and those are all the ones that have been exploding in people's ovens, kitchens, etc.