Dating Antique Bottles
Bottles Circa to Look for side mold seams. 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. You can also clean the outside of the bottle with all-purpose cleaner and water, rubbing well with a damp cloth or very fine steel wool steel wool does not scratch glass. Notice also how unlike most pontil marks, the Owens ring covers the whole base of this bottle. 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.
BOTTLE MOLDS AND SEAM DATING
Bottle of jokes
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. Since the glass is without bubbles, it likely dates during or after the mids. These bottles will not have the side mold seam proceeding from the upper finish side over and onto the rim itself. It is likely this bottle also dates from that era, i.
- By the midth century, embossed lettering and marking on bottle bodies and bases, denoting manufacturers and products, made more precise dating possible.
- The overall crudity of the bottle would indicate a manufacturing time on the earlier end of this range.
- Once again more information could be found on these bottles by searching the internet.
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- How to Identify Old Bottles.
- It is a very confusing subject, to be sure!
- The proximity of the company to Oregon would make it a likely source.
- Keep in mind that older technology often persisted and some bottles date later than you might think.
- Post Bottles Do the mold seams go all the way from the base to the lip?
The earliest bottles were hand-blown by a glassblower with a blowpipe and lack seams. Thousands of people ask Digger questions about their bottles. Both of these medicine bottles look much like their earlier counterparts.
Slowly the corked top bottle began to disappear in favor of the screw top. There is also no neck ring mold seam immediately below the finish like found on most Owens machine produced bottles and on a majority of all machine-made bottles. Dating antique bottles requires knowledge of the evolution of bottle technology and the ability to research manufacturers and bottling companies. This technology lag makes some diagnostic characteristics better than others for dating.
All the characters on the base are faint. Please see my page on Artificially purpled glass here. Helene, the positioning of date and mold codes on Coke bottles varied over the years. All turn-mold bottles are round in cross section and unless stained, percent accuracy of will usually have a polished looking sheen to the glass surface.
There are no sharp lines to the bottle, just rounded corners and features. The disk-like mark is sometimes confused with a pontil. If a user needs to refresh themselves on the terminology used to describe the various parts of the bottle, click on Bottle Morphology to view a pop-up page of physical bottle feature definitions.
Diamond-I mark on bottom of amber bottle made by Illinois Glass Company. With the uniformity, potassium argon dating wikipedia came the possibility to create a solid seal with a screw cap. We were hoping to find some information about it. Strictly Necessary Cookies Strictly Necessary Cookie should be enabled at all times so that we can save your preferences for cookie settings. There is a blank field where all the details go between the skirt and the shoulder.
This page also shows how other portions of this website can provide information pertinent to the bottle in question. Warning Do not estimate a bottle's age by its shape. The glass is rough not sharp around the circumference of the Owens ring. This question asks if there is either any embossing on the bottle or if there are mold seams present on the body, shoulder, or neck.
How to Date Antique Glass Bottles
Glass Manufacturers Marks on Coke Bottles
Glass Manufacturers Marks on Coke BottlesGLASS BOTTLE MARKS
The reverse side and base are not embossed. This question asks if there are any mold seams within the outside edges of the bottle base. The blowpipe style pontil scar puts the date of this bottle as no later than approximately and does indicate that it could date back to or even before. The bottle also does not have a ground down surface on the top of the finish. For brevity, most of the specific references are not noted in the key's narratives.
DATING BOTTLES BY THEIR TOPS AND BASES
The example bottles are tracked though the Bottle Dating page questions in that pages directed sequence. This final example will date two different age examples of bottles with virtually the same size and shape but which held different products and came from opposite ends of the country. Although there are examples of bottles having mold seams that fit these date ranges properly, the issue of dating bottles is vastly more complicated than the simple reading of side mold seams. Once the likely bottle age or date range is determined, some examples of other places to look for more information is provided. We can always have some indication of a starting date for a technique if we can find who first put the idea into practice.
Published works generally cover either a particular city, region, or category of bottles. The Coca Cola logo is faded, dating but still visible. Click here for a picture of a typical s to s milk bottle.
But the process was completed in a single blow. In hand, the bottle does not have any bubbles in the glass. This is the base of the bottle whose lip is shown above left.
For example, glassblowers still make hand-blown bottles today. Move to the next question. Inside the Owens ring are several numbers. Many identical shapes persisted through time and others were brought back for nostalgia and made common again.
The automatic bottle machine was much more precise in gathering an exact amount of glass and the same amount of glass for each bottle this consistency lead to more uniform products. Any idea what year this may be from? 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. There is frequent hyper-linking between the diagnostic characteristics and terminology listed on this page and other website pages.
This was the manner in which the early Owens bottles were blown. How to Identify Antique Glass Bottles. Note the diagonal line which cuts across the base is obliterated by the Owens Ring the large off-center curcular feature. All of the bottle mouths shown below were machine made.