How to Date Old Ball Mason Jars. Ball mason jars are a type of home canning jar made by the Ball Corporation. The company started making mason jars back in and many people today still use these for canning, or collect the jars as a.
Ball - Mason Jar - printed upside down. Only about a dozen of these error jars are known to exist - Antique Fruit Jar Hall of Fame + information, pictures and lots of links to sites with background info on vintage jars - via Antique Bottles