Dating american bottles


03-Jul-2019 20:52

It is unlikely that this bottle was made during the same era, but instead was reused for a lengthy period or otherwise retained until broken or discarded.

Pontiled base fragments could also be from later produced "specialty" bottles which are described below.5.

Unfortunately, the complexities of precisely dating bottles is beyond the scope of any simple key.

A substantial amount of bottle type specific information must be reviewed by a user to increase the probability of dating accuracy.

If the specific attribute is no known, you can enter "unknown," where allowed.

You must enter all of the attributes for the engine to function correctly and give an accurate estimate.

While running a bottle through the key questions, the user is frequently directed to move to other website pages to explain diagnostic features and concepts as well as to add depth and/or precision to the initial dating estimate.

Please be aware that in order to gain the maximum information about any particular bottle (e.g., dating, typing) the user must usually must review a number of pages within this website.

This bottle dating "key" is a relatively simple "first cut" on the dating of a bottle.Only bottles from the Canada and the United States are currently supported and dating ends at 1920.This page and associated sub-pages allows a user to run an American produced utilitarian bottle or a significantly sized bottle fragment through a series of questions based primarily on diagnostic physical, manufacturing related characteristics or features to determine the approximate manufacturing age range of the item.Some technological changes were expensive and not adopted by glass makers until it became an "adapt or perish" issue and many glass factories just perished.

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The shift to the fully automated bottle machine from mouth-blown and some semi-automatic methods in the early 20th century is the classic example (Toulouse 1967, 1969a). The same bottle could have been recycled and reused many times for many years before finally being discarded - entire or broken (Busch 1987).

Using physical, manufacturing related diagnostic features, most utilitarian bottles can usually only be accurately placed within a date range of 10-15 years (i.e., 1870-1880 or 1885) . Like many industries making the leap from manual craftsman production to industrialization and automation, technological advances in bottle manufacturing were not immediately accepted by glass manufacturers or their workers.



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