edit:
@taxlady, These are all wide mouth or regular mouth canning jars, not the bale type.
I'm still canning with loads of jars that are from 1923 and going forward.
I picked up cases of jars in 2019 just before covid, most of them for under 40 cents each. I specifically asked that they don't sell me vintage or collectable (to avoid the problem I have now). Now I just want to minimize them in the house.
I have a half dozen blue triple L's and another half dozen blue dropped A's of the Ball type. Those might be the most collectible. There are some with bubbles in them and misaligned printing on them. I'll probably sell anything that has some worth and keep the rest to use.
Worse, are the ones that when I look them up I can't find anything on them.
There are a few Drey, some Atlas, one Presto, 5 or so of the Kerr Trademark reg in multiple sizes.
Ball jars that don't say mason, some with measurements on the back.
I plan to use some of them to sit in the windows and catch the light. I have some bead collections that when I put them away I can't find them, so if I keep them in a clear jar I might be able to find them when I want them. Same for buttons. Same for polished rocks. Same for keys we don't use. Keys. Marbles. Jewelry that mr Bliss finds with his metal detector.
Little things that catch the light and need a home in the open so they don't become lost. I can't can with odd jars, I get more canning failures that way.
How else could they be used?
edit: I'm still finding more. I found a jar embossed with golden harvest then a cornucopia of fruit and mason. I've gone through hundreds of jars tonight between the upstairs pantry and the used jars in cases by size. I still have to go through about 100 more in boxes in the back of the shelf that I can't reach alone. Then in the next year or so I'll be going through all the canned food in case we used non-standard jars that seale with food in them, they'll go into the messy collection of jars I'm trying to minimize.