Dating presto canning jars

by  |  01-Apr-2020 07:38

John Mason was a tinsmith in New York and perfected a machine that would cut threads into the lids, creating a jar with a reusable, screw-on lid.

This process was easier and more reliable than the tin lid and wax method.

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Soldiers, too, were often left on the battlefields without proper nourishment due to the lack of food-storage solutions.

Indeed, in 1809, Napoleon offered 10,000 francs to anyone that could devise a way to...

If it's a very old model, the number can probably be found on a label attached to the top of the cover.

Old units have model numbers like 40, 50, 204, 603, etc.

Mason's 1858 patent for a fruit-canning jar expired, the brothers prepared to move into glass.

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