Today I found some old Kerr canning jars at an estate sale, and can't seem to find any information on them. The front says "Kerr Economy Trade Mark" and the bottom says " Kerr Glass Mfg. Corp. Sand Springs, OK". They don't have the usual screw top, so I wasn't sure what kind of lid they would have used. (They didn't come with lids) I did find a photo of one with a lid on Google, and it looks like it had a metal or tin lid that was held on by a separate piece of wire. Here's a link to a photo from Google: http://www.sha.org/bottle/Finishes/ecomonypint_small.jpg Just wondering if anyone knows where I can locate some lids, and perhaps how old these are. I think I did pretty well at getting 12 in great condition for just $1.50!