I'm definitely not interested in trying to sell it as I love all different kinds of Ball mason jars. I am just trying to find out if there is a way to confirm it is actually a Ball jar and approximate age. Since it is one I had never seen before I wanted it to add to my collection, not to sell it.
I have a blue mason jar with air bubbles and the number 13 on the bottom but there is no logo on the jar itself. This is not a case of it being worn off, it apparently looks like it was never embossed. It is not perfectly round, you can see some warping on the side (pics 4& 5) and the seams on...