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One can find quite a bit of information on my web site and across the Internet about dating bottles based on whether the mold seam goes up and over the lip or if the bottle has a 'pontil' on the base. Even given these descriptions beginning often mistake a machine made Owen ring on the base of a bottle with a pontil. Specifics on what a pontil looks like or how to tell the age based on the mold seam can be found in Bottle Basics. While these two characteristics are often a strong clue to age, readers will be further helped by developing an understanding how the various categories of bottles changed over time. These diagrams should help clarify age differences based on both form and function. With each chart the reader will find accompanying pictures to further aid in bottle identification and age.

This website will explain why this sharp glass mark on the base of a bottle is a key midth century and earlier diagnostic characteristic.

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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.

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.

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.

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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.

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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. With each chart the reader will find accompanying pictures to further aid in bottle identification and age. Readers first need to develop the vocabulary necessary to distinguish early and late forms of bottles. The following charts and pictures on the dating bottles pages listed below should help.

not on Coke bottles!) and increase to several Dating and Identifying Early Coca-Cola Bottles: Focusing (Mainly) on Georgia and Florida Bottles By Bill Porter with contributions from Bill Lockhart Figure 1 - 3-digit heelcode used by Root Glass Co. 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. First this cautionary note: Bottle dating is not a precise science! Using just physical, manufacturing related diagnostic features, most utilitarian bottles can usually only be accurately placed within a date range of years (i.e., to or ).

Chart 1 The Basics of Dating Bottles Readers first need to develop the vocabulary necessary to distinguish early and late forms of bottles. Screw Tops and the Owens Ring. Read the questions - and accompanying explanations and exceptions - very carefully as the correct answer is critical to moving properly through the "key.

For examples of how to use this dating key see the Examples of Dating Historic Bottles page. 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.

This page also shows how other portions of this website can provide information pertinent to the bottle in question. See the About This Site page for more information about the author and contributors.

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For brevity, most of the specific references are not noted in the key's narratives. They are noted on the other website pages which expand on the information summarized in the key. If you know your bottle is machine-made click Machine-Made Bottles to move directly to that page.

If you know your bottle is mouth-blown aka hand-made click Mouth-blown Bottles to move directly to that page. If unsure about what embossing or vertical side mold seams picture below are, click on Bottle Morphology to see this sub-page for a illustration and explanation of these and many other key bottle related physical features.

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Return back to this page by closing the Bottle Morphology page. 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. YES - The bottle has embossing or visible vertical side mold seams somewhere on the body between the heel and the base of the finish or lip. A bottle may have mold seams but no embossing, but all embossed bottles were molded and have mold seams even if they are not readily apparent.

See note 2 below if there is embossing but it is only within a disk of glass which appears applied to the neck, shoulder or body of the bottle.

Australian antique bottles part 2 - How to date old bottles from the 1800s Convict/Goldfields/Codds

This bottle is either free-blown"dip" molde or was produced in a "turn-mold" aka "paste-mold" where the side mold seam is erased during manufacturing. A "NO" answer is much less likely than "YES" for this question as a very large majority of bottles made during the 19th century and virtually all made during the 20th century were mold blown resulting in mold seams; see the note below.

Notes : 1. A low probability though possible "NO" alternative is that the user has an unembossed, molded bottle with no visible vertical side mold seams.

This can be due to one or a combination of factors including post-molding hot glass "flow" masking the mold seams, fire polishing of the bottle body, or atypically good mold part s fitting precision.

If necessary, look very closely at the bottle shoulder - the best location to see vertical side seams on mouth-blown and most machine-made bottles - in good light with a hand lens to see if there is at least some faint evidence of where the mold part edges came together. 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.

If the embossing on a bottle is only within a separately applied blob seal similar to that shown to the right click to enlargeand found nowhere else on the bottle, the bottle is almost certainly mouth-blown.

How to Date Coke Bottles - It's Not an Easy Thing. Having shared happiness with the help of their products for more than years, the brand has employed various symbols. There are numerous plants that manufacture glass Coke bottles all over the world. Also, over the years, there had been differences in branding the bottles. Vintage Bottle Guide. Bottle collecting has become an increasingly popular hobby among antique lovers in the United States. But bottle buff interest isn't confined to historical flasks and ornate decanters; it also includes many types of modern bottles, reproductions, and "collectibles"-bottles not old enough to qualify as antiques-such as the early Clorox liquid . Historic Glass Bottle Identification & Information Website: Main Subject Pages: 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.

This is another low probability choice but certainly possible. 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.

The concept is that the higher the side mold seam on the bottle the later it was made - at least in the era from the early to mid 19th century until the first few decades of the 20th century. Kendrick's explains in the text pages that It is true that the mold seams can be used like a thermometer to determine the approximate age of a bottle.

Vintage Bottle Guide

The closer to the top of the bottle the seams extend, the more recent was the production of the bottle. The chart accompanying this statement notes that bottles made before have a side mold seam ending on the shoulder or low on the neck, between and the seam ends just below the finish, between and the seam ends within the finish just below the finish rim top lip surfaceand those made after have mold seams ending right at the top surface of the finish, i. Although there are examples of bottles having mold seams that fit these date ranges properly, the issue of dating bottles is much more complicated than the simple reading of side mold seams.

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If it were that simple much of this website would be unnecessary! For example, the process that produces a tooled finish frequently erases traces of the side mold seam up to an inch below the base of the finish whereas the typical applied finish has the seam ending higher - right at the base of the finish Lockhart et. The reason this is noted here is that the concept keeps popping up in the literature of bottle dating and identification ranging from Sellari's books Sellari published shortly after Kendrick's book to as recent as Fike and Heetderk's For a broader discussion of this subject see Lockhart, et al.

If unsure about what the liprimor finish of a bottle is, check the Bottle Morphology sub-page. Toledo, OH. This is a "machine-made" bottle or jar and will also usually have a highly diagnostic horizontal mold seam just below the finish base that circles the neck. The picture to the left shows both of these mold seams click to enlarge.

If your bottle fits this description, click Machine-made Bottles to move to the related webpage which allows the user to pursue more information on bottles produced almost totally in the 20th century by some type of automatic or semi-automatic bottle machine.

The vast majority of U. The following is a discussion of the most common exceptions to the side mold seam "rule" describing a few types of machine-made bottles on which the vertical side mold seams do not quite reach the top edge of the finish making them possible appear to be mouth-blown. Fire Polishing - Although infrequently 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.

These bottles will not have the side mold seam proceeding from the upper finish side over and onto the rim itself.

Starting January 1, all bottles were required to use metric measurements (ml, 1 liter, etc.). Some bottles produced during the transition will show both metric and ounces. Incidentally, the term "fifth" for a bottle of liquor comes from the fact that the . 26 rows  OLD BOTTLE IDENTIFICATION AND DATING GUIDE. This webpage is intended to . Get the best deals on Collectible Antique Bottles (Pre) when you shop the largest online selection at marionfoaleyarn.com Free shipping on many items Make Offer - Lot Of 13 Antique Vintage Cork Top Medicine Bottles. Antique Local Blob Mynderse & Ainsworth Schenectady NY .

Ostensibly this was done to remove the mold seam rim "bump" that was sometimes left by earlier machines - an action which may have helped facilitate better sealing with crown caps, screw-thread caps, or similar closures which sealed on the rim of the finish.

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. They will also have other machine-made characteristics as described on the Machine-made Bottles page.

Chart 1 The Basics of Dating Bottles. Readers first need to develop the vocabulary necessary to distinguish early and late forms of bottles. The following charts and pictures on the dating bottles pages listed below should help.

In the experience of the website author, these machine-made bottles are rarely encountered and likely a function of early machine-made wares to s that had less precise mold fitting and resulted in the need for fire polishing to facilitate proper closure function.

Milk Bottles - Many milk bottles made with press-and-blow machines from the very early s into at least the s resulted in vertical side mold seams that gradually fade out on the neck distinctly below the base of the finish. Click here for a picture of a typical s to s milk bottle.

This exception to the side mold seam "rule" was caused by the specific workings of these machines which masked the upper portion of the side mold seam.

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Click on the image to the right to view both mold seam features pointed out on a press-and-blow machine manufactured milk bottle made by the Pacific Coast Glass Company San Francisco, CA.

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 image to the left is a close-up of the shoulder, neck and finish of a small Sheaffers ink bottle click to enlarge for more detail. The image shows the vertical side mold seam ending on the outside edge of the bead finish at a "ring" mold the upper portion of a parison or "blank" mold induced horizontal mold seam that encircles the extreme outer edge of the finish.

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The side mold seam does not extend onto the top surface of the finish, i. These features are pointed out - and much more readable - on the larger hyperlinked image; click to view. The image to the right is a close-up of a small, medium green, machine-made ink bottle.

As above, click on the image to view a larger and much more readable version with the various features pointed out.

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This termination of the side mold seam within the finish short of the rim Sheaffers ink or actually short of the finish itself green ink on these bottles makes it appear upon casual glance that these are mouth-blown bottles having either an improved tooled finish Sheaffers or an applied finish green ink.

However, both bottles are certainly machine-made. Click Sheaffers Ink to view the discussion of this bottles features on the Household Bottles typology page.

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