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Ball Perfect Mason
Is this jar made in ? I also have a quart size Ball Perfect Mason, square, with 13F on the side and bottom. Nevertheless, ebay browsing can be a good way to find out what types of older fruit jars are out there to be found, and the variations in lettering, size, color, etc. I have a jar that is just marked "O N" with the number 11 on the bottom. This is the mark on the base of the Sundae glass shown on this page. My grandfather gave me this jar with Ball perfect mason made in usa A9.