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Click here to return to the main Glass Bottle Marks page. Please check out my summary page on Sea Glass / Beach Glass.Many old Owens-Illinois bottle and jar bases might be found among so-called “Beach Glass”.(The second most common mark encountered is probably that of the Hazel-Atlas Glass Company.) Owens-Illinois took over operation of the Hemingray Glass Company factory, located in Muncie, Indiana, in 1933.Hemingray was a prolific maker of electrical insulators (of many types and sizes) for power lines, telegraph, telephone and other uses.
since 1965, (and officially known as just “O-I” since 2005), this corporation is currently (2018) one of the largest manufacturers of glass containers in the world, if not THE largest. currently operates 19 glass manufacturing facilities within North America.Within a year or two, most glass insulators produced at Muncie were carrying date codes.Owens-Illinois continued to have the great majority of insulators marked with the “HEMINGRAY” brand name, with very few exceptions in later years.(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.