Not even sure if that's the correct term for these, but I found several, (about 100) in my Dad's attic all boxed up. They were wrapped in newspaper dated in the late 1980's, which is when my grandmother passed away. So, with she being of that generation where they knew how to can vegetables.....they must have been hers. I'm guessing they date post WW2. I've googled them and it seems there are many collectors of them, and depending on the name, size, color of glass, etc, they have some value. I'm not sure if seals can still be had for them or not. I certainly don't want to be older, but I would have loved to see my grandparents use these. Going to hang on to them, maybe clean them up and put some jelly beans in them. 8)
