Click on ghost seam to view a close-up explanatory picture of this attribute. No material may be copied for commercial purposes. If so, how many and what size and shape? Asymmetry is an indication of a hand-blown bottle. None of the stippling - given the indented nature of the base center and lack of stippling on the resting surface - would have come in contact with the conveyor belt.
Julian bottle dating
Film clip of an early Owens Automatic Bottle Machine in operation. Do the mold seams go all the way from the base to the lip? The presence of a circular valve mark on the base of a bottle typically a wide mouth bottle or jar is sure evidence of machine-made manufacture by a press-and-blow machine. In order to be in compliance with the Gould Amendment, soda bottlers in El Paso along with those in the rest of the U.
How to Date Antique Glass Bottles
Click here for a picture of a typical s to s milk bottle. Not defending one practice over the other, but long as their product still sells, why would they change their process? 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. 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, dating site sierra leone and a portion of the shoulder.
A Guide to Dates on Beer Bottles
Julian dating is easy enough to figure, but that doesn't change that fact that a uniform bottling date format is easily achieved and most preferred by the craft beer crowd. Other types of base perimeter stippling resembles small crescents - - which is very common on modern beer bottles. Michael Owens is the second person shown picking up and examining a couple beer bottles.
That is the point of this website. Its also sometimes hard to see especially with black in on dark bottles not a fan of that one bit. This, and no mold seams, meaning is another indication of a hand-blown bottle.
This is a Mexican made liquor bottle intended for the U. Sealed with some other type closure? Before jumping into the key, dating in it must again be emphasized that no single key can get a user to an absolutely precise date for any bottle.
Knurling was machine impressed on the base plate. All turn-mold bottles are round in cross section and unless stained, will usually have a polished looking sheen to the glass surface. Most machine-made bottles have mold seams about the thickness of a hair while most visible mouth-blown mold seams tend to be several times as thick, higher, dating but more rounded. Is embossed lettering present?
Date Your Glass Soft Drink & Beer Bottles
Tip Keep in mind that older technology often persisted and some bottles date later than you might think. This will be noted where known. Just tell me when you put it in the container. Does the bottle appear light purple in color?
Bottles Circa to Look for side mold seams. The image to the left is a close-up of a bottle with bubbles in atypically high quantity for illustrative purposes. If your bottle has this statement embossed in the glass, it is a machine-made liquor bottle that dates between and the mids. Time has taken its toll on records, of course, 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. The types of bottles illustrated on these pages would be considered typical of the earliest machine-made bottles in the U.
Read through each of the questions to see which have pertinence to the bottle you wish to date. More specifically, there appears to have been an increase in the homogeneity and uniformity of glass as the technological advances of the machine era proceeded. Also keep in mind that bottles could have been used and refilled multiple times. Bubbles in the shoulder glass of a bottle. These bottles are discussed in more detail in the ink bottle section of the Household Bottles non-food related typology page.
In another instance, worker opposition was so strong that the machine operations were abandoned! Check for lack of bubbles and uniform glass thickness. Narrow neck press-and-blow machine? So if one has a machine-made bottle with a stippled base one can be quite certain that it dates from or later. Warning Do not estimate a bottle's age by its shape.
North American Soda & Beer Bottles - Date Your Glass Bottle
In the early s, realizing that single digit date codes were repeating e. Thus far, I have found no datable, mouth-blown, El Paso soda bottles containing volume information. For more information click colorless glass to go to that section of the Bottle Colors page.
The statement about machine-made bottles may seem contradictory finer but more visually distinct but is a function of the higher machine blowing pressure. This was apparently the earliest of the viable commercial machines, and in fact, the clip was made to help promote and sell the machine to potential buyers. Is the bottle machine made and aqua- or light green in color? Stippling is shown on both the bottle bases in the images and was typically produced by hand punching the base plate of the bottle mold.
Please be aware that in order to gain the maximum information about any particular bottle e. Once again though, this bit of information does not help pin down the date. This will be shallower, wider and more perfectly circular than a pontil mark.
Does anyone have any insight on why a brewery would use a Julian dating system over the conventional way? Likewise, the probability that a bottle exhibiting mouth-blown hand-made diagnostic features dating prior to the mids is very high and after the s is very low, though not impossible as noted above. There is frequent hyper-linking between the diagnostic characteristics and terminology listed on this page and other website pages. In addition to technology, products and manufacturers, certain types of glass colors will also aid in dating.
The top illustration shows a cork finish i. This bottle is also an example of how even with the relatively ample amount of information Owens-Illinois bottle bases provide, one may still need to rely on more than one piece of data e. The bottom slew of numbers is the time of day it was bottled. Suction scars can not be produced by feed and flow automatic machines i. The Owens machine revolutionized the bottle industry.
The various Owens-Illinois markings provide an opportunity to also identify which plant made the bottle and in what year. Blown-in-mold bottles without pontil marks date circa s to s. 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. Julian dating, coding, etc. When a dating sequence dead ends, it will be noted and other website pages suggested and hyperlinked for the user to consult.
How to Date Antique Glass Bottles
Both require more specific research to refine the bottle's date beyond observation of technology. Most other types of bottles still would have been mouth-blown during this same era. This entire website is essentially a key to the dating and typing of bottles. Narrow mouth machine-made bottles - regardless of the type machine they were produced on e. It is true that the mold seams can be used like a thermometer to determine the approximate age of a bottle.
- All the current methods are better, and I find Julian to be the least onerous.
- Keep in mind that older technology often persisted and some bottles date later than you might think.
- Unfortunately, the complexities of precisely dating bottles is beyond the scope of any simple key.
- If you know your bottle is mouth-blown aka hand-made click Mouth-blown Bottles to move directly to that page.
- AlpacaAlpaca and AlcahueteJ like this.
- People who aren't nerds about beer are probably better served by a best-by date.
- Julian dating drives me nuts as well.