Lots of insulators around this weekend. We went to a couple of flea markets and I didn't find much (a nice wooden horse, and some small Westinghouse ashtrays), then decided to stop at an antique store we had been meaning to go to. She had these three in the store. I don't know what the porcelain is, it's about the size of a U-499A but the groove is deeper on the top. Nice glaze though.