Dating antique bottles
Until the 19th century the method of blowing a piece of molten glass with a pipe and some other simple devices into the shape of a bottle was the only way to produce wine bottles.
There was of course the method of casting, where you simply heated the glass to a higher temperature and then let the liquid glass run into a mold where it cooled down.
This is a machine-made bottle and dates after 1910. This will be shallower, wider and more perfectly circular than a pontil mark.
Bottles with suction scars were made in an Owens Automatic Bottle Machine and date after 1903.
This, and no mold seams, is another indication of a hand-blown bottle.
A pontil rod held the nearly molten bottle during the final stages of manufacture.
Key sections include dating, typing/typology, glassmaking, colors, finishes, bodies and seams, bases, fragment identification and a glossary.
Recycling was very common until the mid-20th century.The lettering “Federal Law Forbids Sale or Reuse of This Bottle” indicates a liquor bottle made from 1935 to the 1960s. Having written extensively on North American archaeology and material culture, he has contributed to various archaeological journals and publications.Peterson has a Bachelor of Arts from Eastern New Mexico University and a Master of Arts from the University of Nebraska, both in anthropology, as well as a Bachelor of Arts in history from Columbia College.Blown-in-mold bottles without pontil marks date circa 1860s to 1910s.Do the mold seams go all the way from the base to the lip?