That is the point of this website. These bottles will, however, have the vertical side mold seam progressing all the way to the very top of the finish side, just not onto the rim. That would be only for the exceptional piece.

We have tried to define the distinction between these two classes of bottles from the perspective of the intent of and information found on this website. Mold Seam Most bottles produced in the past years were formed by blowing molten glass into a mold. Can anyone provide me any info or history for this bottle?

Can anyone give me any information? The Owens ring again covers the entire base and even intrudes out to the side of the bottle slightly. If you know your bottle is machine-made click Machine-Made Bottles to move directly to that page.

Using physical, manufacturing related diagnostic features, most utilitarian bottles can usually only be accurately placed within a date range of years i. The O I symbol on the bottom is for Owens Illinois which is the manufacturer of the bottle. We can always have some indication of a starting date for a technique if we can find who first put the idea into practice. The opinions expressed are those of the author of this website and not necessarily those of The Society for Historical Archaeology nor the Bureau of Land Management.

Dating bottles by their tops
Dating bottles by their tops and bases
Dating bottles by their tops

An entire book called Bottle Makers and Their Marks by Toulouse documents the hundreds of markings made by glass manufacturers. Both of these medicine bottles look much like their earlier counterparts. Thousands of people ask Digger questions about their bottles.

Any idea where I can research more on it. Beginning collectors often confuse an Owen's ring with a pontil mark and it is easy to see why this happens. The earlier green glass ink bottle is also certainly machine-made, most likely on an early semi-automatic, blow-and-blow machine based on its crudeness and lack of a suction scar. Most free-blown bottle date prior to and can be much older.

The third picture shows the base of a milk bottle from just after the trun of the century. In addition, other references beyond the scope of this website usually must be consulted to get as complete of a dating and typing story as is possible for any given bottle. Author reserves the right to update this information as appropriate.

  • Also, the format and space constraints of a journal article do not allow for the elaboration and illustrations necessary to make a key function fully Jones b.
  • Notice also how unlike most pontil marks, the Owens ring covers the whole base of this bottle.
  • The screw top is black with decorative lines etched vertically down the sides at different lengths.
  • These bottles will not have the side mold seam proceeding from the upper finish side over and onto the rim itself.


Dating bottles by their tops



When a dating sequence dead ends, it will be noted and other website pages suggested and hyperlinked for the user to consult. If your bottle is an ink fitting the descriptions above, click Machine-made Bottles to move to the Machine-made bottles dating page for more possible dating refinement and to pursue more information. If using this site for the dating or typing of a known or likely Canadian-made bottle, keep this in mind as the reliability of the information may be reduced.

The middle picture shows an open pontil on the base of a cylindrical medicine bottle. Often the vertical side mold seams are evidenced by very faint changes in glass density in lines where one would expect mold seams to be. Use that page to get a feel for the structure of this website and to access any of the other web pages. Be aware that reproductions can have smooth, guide to dating in your molded pontil marks or sometimes an authentic looking jagged mark.

Dating bottles by their tops

Lips were still applied or finished but you might not even notice any irregularities. Before jumping into the key, it must again be emphasized that no single key can get a user to an absolutely precise date for any bottle. As with many companies, finding any history is a research project which begins with searching city directories, town records, historical societies, free hiv etc.

Bold and garish colors are also rare in antique bottles, so beware of bright reds, greens, yellows and purples. The author has also seen Star Bitters labels on Wait's bottles as well as both labels on the immensely period popular Hostetter's Stomach Bitters bottles! These pages lead a user through a series of questions about the physical - or morphological - characteristics of historic bottles which help to narrow down the age of an item.

What is the value for a no seam hand blown wine bottle? This outline covers basic patterns but note that there are exceptions to every rule. To some extent, the height of the mold seam on the bottle can indicate age. Click here for a picture of a typical s to s milk bottle.

There are lines towards the top and also toward the bottom that look like some form of decoration. This page guides a user through the key for seven different type and age bottles with several being side-by-side comparisons of very similar bottles of different eras. Only a relative few geographic areas or areas of collecting interest have received more than cursory historical treatment and the majority of this is due to the efforts of collectors.

Guidelines for Determining the Age of Antique Bottles

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. Click Mouth-blown Bottles to move to the portion of the Dating key for Mouth-blown bottles new webpage. They will also have other machine-made characteristics as described on the Machine-made Bottles page. Published works generally cover either a particular city, region, or category of bottles.

Dating Antique Bottles

  1. When were they made, and are they collectors items?
  2. Most bottles produced in the past years were formed by blowing molten glass into a mold.
  3. Fire Polishing - Occasionally encountered machine-made bottles may have fire polished finish rims - a process which eradicated evidence of the neck-ring mold seam on the rim of the bottle.
  4. They had their own printing department and produced a huge variety of trade cards, almanacs, calendars, etc.
  5. Close up of iron pontil Close up of an open pontil milk base for comparison.
Dating bottles by their tops

Can I open it up and clean it? Sheared top bottles are another case where mold seam height is not a good indicator of age. What is the age of the bottle?

Dating bottles by their tops

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  • Dating bottles by their tops, dating antique bottles