(Thanks to Ken Rudd for submitting this photo)." src="https:// alt="Base photo of amber Dad's Root Beer bottle, carrying the "old" Owens-Illinois mark, but with an unusually late 1960 date code! " width="300" height="258" srcset="https:// https:// https:// sizes="(max-width: 300px) 100vw, 300px" / The mark “O-I” has also been in use for some time in very recent years (but I’m not sure when it first appeared on containers).
Within a year or two, most glass insulators produced at Muncie were carrying date codes.
Base of Yacht Club Beverages ACL soda bottle, bearing 1966 date code along with older mark.
(Photo courtesy of Taylor Mc Burney) " data-medium-file="https:// data-large-file="https:// class="wp-image-1921 size-large" title="Base of Yacht Club Beverages ACL soda bottle, bearing 1966 date code along with older mark.
Many millions of insulators were made at Muncie, up to 1967.
(See my webpage on Hemingray Glass Company for more information on Hemingray insulators.) Known as Owens-Illinois, Inc.