Canning jar dating


10-Jul-2020 00:32

That was the date when John Mason received his patent for the threaded screw-type closure, and it appears on many different brands of jars. Check the logos below against the logo on your jar. Ignore the Mold Number How about that big number on the bottom of many jars? The quality control people used the number on the bottom of the jar to identify which mold was producing bad jars.The number has nothing to do with when the jar was made.If you are an aspiring collector, you may want to pick up a copy of Redbook 9, available on Amazon.This book is no longer is print, but it is avaialble on secondary markets and you can get descriptions and basic values of your jars. Many canning jars feature the manufacturer's name or the patent date embossed on the glass.Although they took up less space in the pantry, they were never as popular as the regular canning jars and so are a little rare - making them a little higher in value. Of course, the better the condition of the jar, the more it will be worth.Chips and cracks will diminish the value of old canning jars significantly, while a jar in good condition with its original lid will be worth the most.

Instead, I mean how do you tell how old your Ball jar is?

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