The third picture shows the base of a milk bottle from just after the trun of the century. Check for lack of bubbles and uniform glass thickness. Having written extensively on North American archaeology and material culture, he has contributed to various archaeological journals and publications. The warning messages include words like not to be sold, to be returned, kit loaned etc.
Dating Your Old Bottles
In the neck on the right notice how just below the collar the mold seam goes complete around the neck. Do the mold seams go all the way from the base to the lip? Keep in mind that older technology often persisted and some bottles date later than you might think.
Is the bottle highly symmetrical, but lacking mold seams? The city name has nothing to do with it. Close up of iron pontil Close up of an open pontil milk base for comparison. These bottles are discussed in more detail in the ink bottle section of the Household Bottles non-food related typology page.
The Owens machine revolutionized the bottle industry. It is easy to date Coke bottles that are made by the Root Glass company. How to Identify Genuine Antique Decanters. This, and no mold seams, is another indication of a hand-blown bottle.
Dating Antique Bottles
In short, fast hookup there was and is nothing to stop a glassmaker from using an obsolete method in the production of a bottle. In the center of the Owens Ring the Owens mark is shown the diamond. One unique closure to the late s was a three point screw top. Most free-blown bottle date prior to and can be much older.
Notice also how unlike most pontil marks, the Owens ring covers the whole base of this bottle. The three questions found on this page below answer several basic questions about a given bottle. Published works generally cover either a particular city, region, or category of bottles. People assume that the city label on glass bottles specify the place where they are manufactured, but it is a misconception. The picture to the left shows both of these mold seams click to enlarge.
These bottles will not have the side mold seam proceeding from the upper finish side over and onto the rim itself. We will also provide you some tips which would help you in this process of differentiation. If it were that simple much of this website would be unnecessary! Note the diagonal line which cuts across the base is obliterated by the Owens Ring the large off-center curcular feature. Both require more specific research to refine the bottle's date beyond observation of technology.
THE SEAM METHOD - OF DATING OF GLASS BOTTLES
With the uniformity, came the possibility to create a solid seal with a screw cap. Time has taken its toll on records, of course, what is double dating means but much of what happened in the past was simply not documented well or at all as with most endeavors of common people in the past. 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.
How to Identify Antique Glass Bottles. The scar was left when the pontil was detached from the bottle. The information on this website will, however, usually produce a reliable manufacturing date range for a majority of American utilitarian bottles manufactured from the early s to the midth century.
Vertical side mold seam on the neck of a beer bottle ending well below the finish, indicating that it was at least partially handmade - ca. All of the bottle mouths shown below were machine made. Return to the top of this page. Many specialty bottles were imported from Europe, though that fact may be at times hard to impossible to ascertain.
This is the base of the bottle whose lip is shown above left. This is an attempt to simplify things and present in a way that is easily understandable. Do not estimate a bottle's age by its shape. These two manufacturing types can be hard to differentiate from each other, though free-blown bottles are almost always round or oval in cross-section and have lines that are not sharp i.
DATING BOTTLES BY THEIR TOPS AND BASES
As Coke is a large manufacturer, it usually produces bottles to circulate in different cities. Dating Bottles by Color Is the bottle machine made and aqua- or light green in color? Instead, there is one located near the base of the neck indicating that the neck ring mold portion of the parison mold produced the finish, neck, and a portion of the shoulder.
- This was almost universal with many beverage bottle types e.
- Bottles issued by certain plants will show symbol of Coco-Cola on the base of the glass bottles.
- They are noted on the other website pages which expand on the information summarized in the key.
- Recycling was very common until the midth century.
- The style of this trademark is tall and thin.
- Another exception example is that the bottles for expensive, low production liquors e.
- The pressure from the automatic machine was strong and the molds fit tight leaving only a very thin line.
- One approach to helping beginner identify their old bottles involves show them the bases of old bottles.
- Notice how sharp and fine the mold seam line is.
- 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.
By the midth century, embossed lettering and marking on bottle bodies and bases, denoting manufacturers and products, made more precise dating possible. Dating antique bottles requires knowledge of the evolution of bottle technology and the ability to research manufacturers and bottling companies. Newman's key made a noble attempt at simplifying bottle dating, but is weakened by the fact that the subject is much too complex to be conducive to such a simple approach by itself. Before manufacturing Coke bottles, Coca Cola was produced in soda fountains. The earliest bottles were hand-blown by a glassblower with a blowpipe and lack seams.
When a dating sequence dead ends, it will be noted and other website pages suggested and hyperlinked for the user to consult. Likewise, the Coke manufacturer also took out patents for some aspects that can help you identify them. The Owens ring again covers the entire base and even intrudes out to the side of the bottle slightly. This is different than an older hand tooled, hand blown bottle.
BOTTLE MOLDS AND SEAM DATING
The glass is rough not sharp around the circumference of the Owens ring. This closure can be found on Whisky and medicine bottles of the period. How to Identify Perfume Bottles. Is the lettering applied and in color?
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. Close-up of the finish lip of an Illinois Glass Co. Click Mouth-blown Bottles to move to the portion of the Dating key for Mouth-blown bottles new webpage. The side mold seam does not extend onto the top surface of the finish, i. The middle picture shows an open pontil on the base of a cylindrical medicine bottle.
The disk-like mark is sometimes confused with a pontil. Acceptance often occurred over a period of many years or decades in some cases. This is done to allow the user to get more information or clarification as they proceed through the key.
There are numerous plants that manufacture glass Coke bottles all over the world. Bottles Circa to Look for side mold seams. It is true that the mold seams can be used like a thermometer to determine the approximate age of a bottle.