Thanks Gunsmoke and Warren! I still havent been able to totally identify it, most on EBay have a cross or the CJ letters on them and numbers on the bottom. Mine has no designs on the jar, and just an E on the bottom. Thanks Again!
Yep, Keystone Glass Works. The 1858 Masons were made by many different glass houses and there are many different variations of them as well as several different variations of the keystones.
Hey Julie, It is just as common as the other two. Here are two of mine. The one is like yours. I have a couple more somewhere.