So if you have some old jars, how do you know their true age? If you have a Ball jar, you can date most of them just by looking at the logo. Every few years, the Ball Manufacturing Co changed the logo and if you compare yours to a reliable chart, you know how old it is.

Why do mason jars say ball?

Mason jars are also called: Ball jars: in reference to the Ball Corporation, an early and prolific manufacturer of glass canning jars.

How old are lamb Mason jars?

#3 – The age of a Mason jar can be roughly determined by its manufacturer and logo. With short-lived companies such as Lamb, Atlas and Drey, its pretty easy dating their Mason jars. For instance, a Lamb Mason jar was made from the 1930s to 1940s by the Lamb Glass Co.