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To date Kerr mason jars, look for the number 5 on the bottom of the jar. This indicates that the jar was made in 1915. If you see a 6 on the bottom of the jar, this means it was made in 1916.
- How to Date a Kerr Mason Jar
The most common ways to date a mason jar are by the patent...
- How to Date a Kerr Mason Jar
The most common ways to date a mason jar are by the patent date or the manufacturing company. The patent date is usually found on the bottom of the jar and indicates when the design for that particular style of jar was first patented.
There are some general guidelines to approximate the date of a vintage Kerr jar between 1915 and 1930. The finish on a fruit jar can tell you roughly about the date it was made. If the finish on the base is smooth on the lip of the jar, it usually means the jar was machine-made after 1915.
Dating Kerr Mason Jars: A Step-by-Step Guide. Look at the Logo: Early Kerr jars are marked with the "KERR" logo in all capital letters, while later versions might have different font stylings. Changes in the logo over time can give clues to the jar's age.
9 cze 2024 · Kerr “Self-Sealing” Mason jar in clear glass. This particular variant is marked with the AHK initials on the base and probably dates from the 1970s.
1 lip 2024 · A mason jar or canning jar is older and more valuable if it has older, simpler logos or brand name embossments. You can also look for signs of an old make, such as pontil marks, mold seams, bubbles, uneven glass thickness, etc., to make sure it’s a real vintage jar.
19 maj 2023 · Look for key details such as the type of jar, the logo, color, size, and other distinguishing marks to accurately date the jar. For instance, paying attention to the Ball Mason jar logo can give you a general idea of its manufacturing date.
