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Check e Bay for jars with descriptions or pictures that match yours and see what they've sold for in the past by searching "Completed Listings".
These humble glass pieces were designed for putting up fruits and vegetables in the days before refrigeration.
In recent years folks have re-fallen in love with the Mason jar.
Many of us remember our mother or grandmother canning vegetables and fruits from the garden and others love the quaint look of flowers in a blue Mason jar.
Instantly recognizable by avid vintage-lovers, the Nov.
30th 1858 patent date appears on literally thousands of canning jars produced between 1858-1920.
Woolgar graduated from the Langara College Journalism Diploma program in 2008.
This means it would be post-1930, during days of more efficient machines.
Mason wasn’t the only manufacturer to add this patent date to his jars, hence its vast proliferation.
John Mason invented and patented the process for cutting a thread onto the lip of glass jars, as well as a corresponding thread inside zinc lids, which could then be screwed tightly onto the jars.
Look for a date of manufacture, job number, plant location and various other information. Phillip Woolgar has been a reporter since 2008 in communities throughout western Canada.
His work has appeared in Canadian national publications such as the "Globe and Mail" and the "Vancouver Sun." In 2009, he received second-place recognition in the Alberta Weekly Newspaper Association's Excellence in Arts and Culture writing category.