Here is an aqua Hard Mfg. Co. / Pat. Appld. For, it is a Chair leg bed glide insulator. Patent 1,187,387. It looks like a LRI .It has some light scratches and some haze to glass It has a couple couple small flake chip bruises, and a 1/2 inch bruise where the pontil scar was broken off on the top of it. THe scar was nefver ground down. It sticks up on the top. It has an angled grove horizontally leading to a vertical grove on the reverse which was used for attachment. Another Gayner Product.