Dating line illinoise
Illustrated among the pics on this page is the base of a bottle made at the Columbus, Ohio facility (plant #18) with a date code of “7” which in this case probably stands for 1937.
I don’t know how late the word “OWENS” was embossed as a trademark on the base of those medicine bottles.
IMPORTANT NOTE: Many liquor bottles and flasks made by Owens-Illinois have a DIFFERENT mold code configuration on the base, as compared to the way the numbers are arranged on most other types of bottles they made.
Typically, it is marked with a number called a “Liquor Bottle Permit Number” followed by a dash and a second number which is the date code.
Also, there are several posts (scattered through the comments farther down on this page) where we have discussed this question.
(You can use your computer keyboard pressing the “CTRL” and then the “F” buttons, and typing in those keywords to find those comments more quickly.) Recently [July 2013] I have received a photo, submitted by Taylor Mc Burney, showing the base of a Yacht Club Beverages ACL soda bottle, carrying a 1966 date code, but bearing the old logo!
You can find more info on those bottle base variations by searching the internet with the phrase “liquor bottle permit numbers”.(That list is several decades old and does not cover all of the recently started plants).For more detailed discussion on Owens-Illinois Glass Company and the date codes, plant location and mold codes used, check out this comprehensive article written by Bill Lockhart and Russ Hoenig: The Bewildering Array of Owens-Illinois Glass Co. Click here for one of many pages from O-I’s official website.On many bottles, a single-digit date code along with the diamond/oval/I mark may indicate the 1930s.From information compiled in Bill Lockhart’s article (link below) on Owens-Illinois’ date code markings, it appears that, on containers with this earliest trademark, if a single digit date code (such as “O” or “1” placed to the right of the logo) the chances are very good the bottle in question dates from the 1940s, especially the 1940-1947 period.