Thanks, K6TIM. I've dug quite a few of them. Most have nothing on the base. This one intrigued me because of the patent info. Thanks for weighing in!Looking at your jelly jar it certainly turn of the century,and machine made dottle.They used a lot of magnesium to make the bottle in clear glass.After 100 years in the Sun they start to turn sun color purple.The lip is a crimp type lip to hold on a pry open lid!
K6TIM