Start with Question 1 on the Dating page. It is apparent that the answer to Question 1 is "YES" since this bottle has raised embossing in the form of the "swirls" on the shoulder. The embossing indicates that this has to be a molded bottle and can not be either free-blown, dip molded, or from a turn-mold. The user is now directed to move to Question 2 which deals primarily with the side mold seam. The picture to the lower right is a close-up of finish of the Mission bottle.
The bottle also does not have a ground down surface on the top of the finish. The user is now directed on the Dating page to move to the Machine-made Bottles portion of the Dating page. This section of the dating key is a series of independent questions where the answer to any given question is not dependent on the answer to another; a user may view the questions in any order.
A user would first read through the introductory section of Machine-made Bottles for general information about machine-made bottles, then move on to the first question in that section - Question 8 - which deals with the glass color. Since the bottle appears clear or colorless, "B" is the answer that fits this bottle. In reading through "B", there are a couple other options available to help refine the dating a bit. If one looks closely at the thick glass in the base of the bottle, one can see that the glass is not quite perfectly colorless, but instead has a slight "straw" or washed out amber tint to the glass picture of base below.
Looking at the two options under Question 8, it is clear no pun intended that this bottle matches refinement 2 which makes it highly probable that this bottle dates after and but probably no later than the s. We now have refined the bottle age range a bit more - between about and Move to Question 9 dealing with bubbles in the glass. A close look at the picture indicates no bubbles in the glass, though subtle glass details cannot be easily portrayed in a picture.
As pictured, it can vary slightly from one container to another. Latest confirmed date code with this older trademark known on a bottle is On the typical bottle, there is usually a number to the left of, to the right of, and below, the trademark. Several of the plant numbers used by O-I have been re-used by other plants opened in later years, so it is important to take into consideration the date code, the bottle style and other characteristics to positively identify which plant location made a particular bottle.
Most bottles from the late s into the s and s have two-digit date codes. For more info, please check out the extensive article by Bill Lockhart and Russ Hoenig; link farther down on this page. The second mark was phased in during the s with the removal of the diamond. Some bottle molds already in use were not re-engraved until as late as , , , even, as mentioned, in LIQUOR BOTTLE PERMIT NUMBERS IMPORTANT NOTE: These markings are those of the Owens-Illinois Glass Company.
Does the bottle have a finish lip that was sealed with a cork, sealed with an externally threaded screw cap, or sealed with some other type closure? Does the bottle have embossed or labeled contents or volume capacity information? Does all or a portion of the bottle base have a textured pattern, i. Read through each of the questions to see which have pertinence to the bottle you wish to date. Hyperlink to other web pages that are suggested in each question for added information and then read the summary statement at the end of this page which will give some suggestions on where on this website a user could or should proceed to.
Keep track of the specific diagnostic feature date ranges listed in each question you consult, and once to the end of the page, use that information to ascertain the likely production date range of your bottle. As explained previously above, be aware that the "earliest" date used in the questions is not absolute. There were some wide mouth, semi-automatic machine produced bottles albeit a very low percentage which had machine-made characteristics minus a suction scar than can date back as early as the mids.
Lets begin with Question 8 right below Is the bottle glass color: Aqua aquamarine or very pale green ; B. Essentially colorless clear ; or C. A color other than colorless or aqua? The color of the glass in a machine-made bottle can, to a limited degree, be useful in dating.
Owens-Illinois Glass Company
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