I did a little shopping this weekend at my favorite antique and “junk ‘in” spots! I found some really cool old Ball jars. They are quart sized and have sloped shoulders. Some of the glass is wavy and many have bubbles. I’ve never seen any quite like this before, so I brought them home. After doing some research online, I found that these are probably one of the earlier sets of Ball jars to be manufactured. Would you like to know how old your vintage mason jar is?