One approach to helping beginner identify their old bottles involves show them the bases of old bottles. The picture below at the left shows an iron pontil on the base jof a historical flask circa The middle picture shows an open pontil on the base of a cylindrical medicine bottle. The third picture shows the base of a milk bottle from just after the trun of the century. The disk-like mark is sometimes confused with a pontil. Close up of iron pontil.
Owens Bottle Company: O within a SquareGLASS BOTTLE MARKS
Bottle Dating. Click here to move directly to the list of machine-made dating questions. It should be noted that features 1, 3, 4, 5, and 6 are primary indicators of machine-made manufacture. Feature 2 mold seam diameter is not as strongly diagnostic as the primary indicators as mouth-blown bottles sometimes can have very fine mold seams. Feature 7 describes a couple glass related features that are quite consistent in machine-made bottles, but not diagnostic, i. Note: the term "parison mold" and "blank mold" are synonymous for the first mold in the two mold machine process. Vertical side mold seams which usually see the Note box below point 3 for an exception run up to the highest point of the finish and often onto the extreme top finish surface i.
New member here, I have a bottle I picked up at an auction. Now I have done quite a few searches, and have found some from the same liqueur distributor, Marie Brizard and Roger. The difference, is
I am here to clarify a bit of the mystery. Usually, the symbols are a logo for a company, and the numbers a code for where and when the particular glass item was produced. Each glass making company has their own method of labeling their products.