Determining the Age of Vintage Ball Mason Jars

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Frequently Asked Questions

1.

What are the main methods for dating old Ball mason jars?

There are several methods for dating old Ball mason jars, including examining the logo, assessing color, size, and any distinctive marks. The logo is one of the simplest indicators, with different logos corresponding to specific time periods. Additionally, features like unusual sizes and color variations can also provide clues about the jar's age.
2.

How can the color of a Ball mason jar indicate its age?

The color of a Ball mason jar can help approximate its age, as various colors were produced during different periods. For example, blue glass jars were made from the late 1890s to the early 1900s, while green and yellow jars were also common. Post-1940s jars are primarily clear glass, and the production of colored jars ceased in 1937.
3.

Why should I disregard the patent dates on Ball mason jars?

You should disregard the patent dates on Ball mason jars because they do not reflect the jar's actual production date. The 1858 and 1908 patent dates merely indicate the years John Mason patented his design and were used on many jars long after those years. Thus, these dates can be misleading when determining a jar's age.