Age dating ball perfect mason jars
These jars carry the familiar embossing "Mason's Patent Nov. This date refers to the original patent date, not the actual date of manufacture.Jars carrying this embossing, often with other monograms, numbers, letters, etc., were widely produced until about 1920. The identities of many actual manufacturers are unknown.These jars date from the 1910's and 1920's and have no relation to Lewis Boyd. The only source that I know of today where these rings can be found is at or you can get boxes of the old gaskets on e Bay.It is very difficult to determine the age of a fruit jar without seeing it.Once you've seen a few repros it's pretty easy to spot one on a table.Originally when jars were blown by hand, the number represented a specific glass blower and his team. glassblower #3 made 200 jars that day and he and his team therefore gets paid X number of dollars at X cents per jar produced.Square jars were considered a design improvement because a homemaker could stack more jars together in less space thus allowing a family to put up more food in their small cellars or cupboards.
The information has been obtained from various sources or based on my collecting experience and is true to the best of my knowledge.
The value of square shaped jars tends to be higher than round as it seems that fewer square jars were made.