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Department of the Interior, administers and manages over million surface acres of America's public lands, located primarily in 11 Western States and Alaska. Part of the mission of the BLM is the management and preservation of the cultural and heritage resources found on America's public lands - prehistoric and historic. What is the age of the bottle? What type of bottle is it? This entire website is essentially a "key" - albeit a complex one - to the dating and typing typology of historic bottles.
Dating antique bottles requires knowledge of the evolution of bottle technology and the ability to research manufacturers and bottling companies. Although glass bottles have been made for a few thousand years, it was not until the 19th century that bottle use became common, coinciding with the industrial revolution. By the midth century, embossed lettering and marking on bottle bodies and bases, denoting manufacturers and products, made more precise dating possible.
In addition to technology, products and manufacturers, certain types of glass colors will also aid in dating. Look for mold seams.
The earliest bottles were hand-blown by a glassblower with a blowpipe and lack seams. Is the bottle highly symmetrical, but lacking mold seams? This type of bottle was probably dip-molded and dates after circa Is the base indented with an irregular to round pontil scar?
OLD BOTTLE IDENTIFICATION AND DATING GUIDE. This webpage is intended to help novice collectors and non-collectors better identify, describe, and date the bottles they encounter. Bottle dating is approximate and just intended to give a relative placement in bottle making history. dating your old bottles One of the most frequently asked questions about old bottles is, 'How old is this bottle?' Often beginners have a difficult time distinguishing between old and new bottles especially when is comes to modern reproductions. DATING BOTTLES BY THEIR TOPS AND BASES. A Look at Bottle Bases. One approach to helping beginner identify their old bottles involves show them the bases of old bottles. The picture below at the left shows an iron pontil on the base jof a historical flask circa The middle picture shows an open pontil on the base of a cylindrical medicine.
This, and no mold seams, is another indication of a hand-blown bottle. A pontil rod held the nearly molten bottle during the final stages of manufacture.
The scar was left when the pontil was detached from the bottle. Look for side mold seams. If the seams disappear in the neck, the bottle was probably "blown-in-mold" and dates circa to early s. Is a pontil mark present along with disappearing side mold seams? This bottle probably dates circa to Do the mold seams disappear in the neck, but the bottle lacks a pontil mark?
Blown-in-mold bottles without pontil marks date circa s to s.
DATING BOTTLES BY THEIR TOPS AND BASES
Do the mold seams go all the way from the base to the lip? This is a machine-made bottle and dates after Look for a "suction" scar on the base.
This will be shallower, wider and more perfectly circular than a pontil mark. Bottles with suction scars were made in an Owens Automatic Bottle Machine and date after The Owens machine revolutionized the bottle industry.
Note: This is just for a reference guide. The mold seam may not be able to provide a accurate dating. Some glass companies may have been behind on the technology at that time. Below are some other bottle general dating references. Applied Top- Crown Cap- up Free Blown Although glass bottles have been made for a few thousand years, it was not until the 19th century that bottle use became common, coinciding with the industrial revolution. By the midth century, embossed lettering and marking on bottle bodies and bases, denoting manufacturers and products, made more precise dating possible. DATING BOTTLES BY THEIR TOPS AND BASES. DATING BOTTLES BY THEIR TOPS AND BASES. Old Bottles Vintage Bottles Reference Site Milk Jugs Coffee Maker Container Dating Base Magic. How to date old bottles. Bottle Glossary Page.
Check for lack of bubbles and uniform glass thickness. This is another indication of a machine-made bottle. What technology, techniques, or processes were used to manufacture the bottle?
Historic Glass Bottle Identification & Information Website! The Bureau of Land and/or begin their search for information dealing with the fascinating world of historic bottles. This website will help you determine what to look for when identifying and dating historic bottles. If you are attempting to estimate the approximate. Many people are intrigued to know how old their bottle is. There are three keys to help with dating most bottles: Side seams: None: bottle may be free blown, in which case it has a very uneven shape and dates before Or the bottle may have a nice even shape, but was spun in the mold to smooth out the seams; a practice common around A yet a few more factors to keep in mind in the dating of bottles This Bottle Dating page (and website in general) is designed to address what the website author refers to as "utilitarian" bottles & jars (click for more information). Utilitarian items makes up the bulk of the bottles produced during the 19th century and first half of the 20th century.
Where can I go for more information on historic bottles? Blow -pipe pontil scar. Bottle ca.
Dating old bottles by their tops and bases
This website will explain why this sharp glass mark on the base of a bottle is a key midth century and earlier diagnostic characteristic. Even then, the bottles discussed in depth are so primarily to illustrate the presented information and concepts.
Many hundreds of specific historic bottles are used as examples within the pages of this website to illustrate the concepts discussed; with luck you may find the specific bottle you have an interest in discussed though typically you will not. This website is intended for Some of the embossed markings on the bottle base above are a great information source for 20th century bottle identification; some are meaningless.
DETERMINING THE AGE OF OLD BOTTLES
This website will help you determine what to look for when identifying and dating historic 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.
Australian antique bottles part 4 - A look at identifying & dating old bottles from their tops
This complex of pages is a major hub of the rest of this website and the best place to start a search. Also linked to the Dating page is a sub-page called Examples of Dating Historic Bottles which tracks a few different bottles through a dating and general information quest to illustrate how the dating process and this website work.
If you are interested in identifying what a bottle was likely used for - i. This very large complex of pages includes bottle type specific sub-pages with extensive style based dating information, including complete scans of 5 different early 20th century to bottle makers catalogs spanning the mouth-blown to machine-made bottle manufacturing era!
Be aware that none of the pages are all inclusive since related information exists on one or many other website pages. For example, there is information pertinent to dating a bottle on virtually every website page.
The title of any given page gives the predominant theme of that page and would be the first place to start when pursuing information on that particular subject.
However, the process of bottle identification and dating is quite complex with many exceptions; thus, the need for many web pages covering an extensive amount of descriptive information.
A listing or "map" of all the main subject pages and connected sub-pages found within this website is found at the following link - Website Map. Use that page to get a feel for the structure of this website and to access any of the other web pages.
It is suggested that if you only bookmark one page of this website for future reference, that it be the Website Map. That page also includes a summary of significant recent changes and additions to this website.
When possible, the information on this website is given general reliability rating estimates e.
It is recommended that a new user first view a short listing of User Tips about how this site "works.
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