Dating antique ball jars


Shown on this page are pictures of typical trademark variations used on their containers, especially during the early years.  Most of the pics show the first and most widely recognized mark used beginning in 1929.  As pictured, it can vary slightly from one container to another.  It consists of a “Diamond and O (oval)  entwined, with an I in center” and dates from circa 1929 into the mid and late 1950s. (Latest confirmed date code with this older trademark known on a bottle is 1966).   The diamond/oval/i mark may not have been, in actual practice, implemented onto bottle molds until some time in 1930, simply because of the time and effort involved in re-tooling/altering molds already in use.


Dating antique ball jars

Dating antique ball jars



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