Website Goals: This was almost universal with many beverage bottle types e. Baffle Marks and Pontil Scars: It also includes "Bottle Dating Worksheets" pages 51 to 55 by Rebecca Allen and this author to assist in the systematic dating of an historic bottle based on the information in that dating key as well as other information on the website. Practically speaking for the purposes of this website, the difference between the two is unimportant and the precise "look" of these base designs varies quite a bit over time, with different bottle types and between bottle makers. Dip mold bottles usually date prior to but can also be much older back to early 18th century at least.
Use that page to get a feel for the structure of this website and to access any of the other web pages. N otes on embossing, labeling, and existing research. Ating your old bottles were so many people believe they are bottles from london, jars, antique bottles uk. If your bottle is a milk bottle that fits this description, click Machine-made Bottles to move to the Machine-made bottles dating page for more possible dating refinement and to pursue more information. The base to the left above exhibits some subtle out-of-round distortion and has a faint sand pontil. The closer to the top of the bottle the seams extend, the more recent was the production of the bottle. What type of bottle is it?
According to Jonesa dip mold could be made of multiple pieces but they did not open and shut.
Dating old bottles uk
In addition to the above variation possibility, there are several post mold variations or facts to be aware of, as described below: Patent Office It is old to turn bottles in molds for polishing purposes, and it is old to imprint characters on the bottom of bottles which are not turned in the mold; but I claim to be the first one to employ a rotary bottom in the mold. Though sometimes subtle, some mold related features on bottle bases can be used to help date or otherwise classify an item. There is no mold seam that runs horizontally around the upper edge of the bottle heel like is found on a cup-bottom mold produced bottle discussed in next section. Click to enlarge.
What is called the four-piece mold is a variation of the three-piece mold with two body halves; it is discussed in the box below. Short differentiating informational statements are provided below in bold to make an easy "break" between mouth-blown and machine-made bottles. If you are attempting to estimate the approximate manufacturing date - or age - of a particular bottle or significant sized fragment the first page to visit would be the Bottle Dating page and its related sub-pages. Base Cross-section Profiles One base related feature which is not covered in any depth on this page is the base profile or shape. 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. In fact, William F. One of the longest running "myths" in the world of bottle dating is that the side mold seam can be read like a thermometer to determine the age of a bottle.