Eric marks dating
Other marks include “ILLINOIS” a brand name apparently used for a line of prescription bottles (similar to their bottles marked “OWENS”); “DURAGLAS“, a trademark used after 1940 and which appears embossed on innumerable bottles of many types; and “LOWEX” another brand name which was used for their borosilicate glass forumula employed especially for power line insulators.Although Owens-Illinois has made containers of many different shades of color over the years, the great majority of glass bottles commonly found (especially older containers that show up often at flea markets, antique malls, yard sales, junk shops, ebay, etc) are made of clear (colorless), green (emerald, forest green or “seven up” green) and amber (“beer bottle brown”) glass.
(See my webpage on Hemingray Glass Company for more information on Hemingray insulators.) Known as Owens-Illinois, Inc.However, there are some exceptions to this general rule, and single-digit date codes were also used in later decades along with the later “I inside an O” mark (but without a period placed to the right of the code).Most bottles from the late 1940s into the 1950s and 1960s have two-digit date codes.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.To return to the main Glass Bottle Marks page, please click here. Please check out my summary page on Sea Glass / Beach Glass.