For the collector of Ball 'Perfect' Mason Canning Jar here is one from the 1913 - 1923 era.  Jar is 7"  in a teal blue color with a underline under the Ball name.  The "a" in the Ball name is heavily footed. Comes with the zinc lid that can be screw on and off.  There is a rough area on one side of the rim otherwise in good condition. Also noted is some specks of paint that might have gotten on jar when stored and when some one was painting.