Dating vintage canning jars
GLASS FACTORY INFO ~ Dating ~ Antique Bottles ~ Fruit Jars ~ Glass Electrical Insulators ~ Tableware ~ Articles about different kinds of Glassware ~ Manufacturers' Marks used by Glass Companies in the United States Hazel Glass Company, Washington, PA (began 1887) and Atlas Glass Company, also of Washington, PA (began 1896) merged to form the Hazel-Atlas Glass Company, Wheeling, WV, in 1902. Other marks often seen on container glassware found along with Hazel-Atlas products (especially from 1920s-era dumps) include the “I in a diamond” from Illinois Glass Company, the “O in a square” mark used by Owens Bottle Company and the “Capstan” mark used by Capstan Glass Company.
Click here for a handy chart that gives dates for the different logos used.
Later, the process was “perfected” by Ball in 1913 when his factory was able to produce both the lid and jar to ensure a perfect fit each time.