What is an Atlas Mason Jar? Hazel-Atlas Glass Company was the company responsible for producing authentic Atlas mason jars. The company was operational for over 60 years from 1902 to 1964 and produced the aforementioned glass jars during that time. These jars were some of their most significant productions at the time.

When did Atlas stop making Mason jars?

Newer jars were made by other companies after Hazel-Atlas stopped manufacturing them in the 1960s, but the oldest jars are among the most valuable.