andy i don't know how to creat a link to this site but try this. go to the cape may county bottle collectors web site, then go to links. there is a link "called how to date ball fruit jars". it is very informative. i was able to date a jar my grandmother give me from her kitchen to approx 1893.
the website said that they invented a machine that made ball jars with no ground lip from 1895, i belive my jar is from 1880 to 1894 somewhere in those years.
the information said that the ball company began using machines to make jar ( with smooth a lip) in 1895 and phasing out the old blowing method (with a ground top). but the transition took several years. going by the chart at the bottom of the page and the embossing on your jar it dates 1896-1910. your embossing doesn't match the older styles.
Hi Guys - To be honest with you, I'm not a big Ball collector, BUT I've never ever seen this style jar with a ground lip. The photo shown appears to have a machine mark on the base, but it's hard to tell. Maybe you could post a photo of the mouth of the jar plus a photo of the base and answer the question once and for all. I for one would be interested. -Thanks, Tammy