These are new, U.S. Made, decorative Lyre pendulum replacement bobs. It has a polished brass finished rim that is approx. 3/4″ wide with a beautiful 7″ convex molded glass center and a beveled edge. Fix a damaged pendulum bob by replacing it with this one or just update the style of your old one!
Some lyre pendulums have a nice decorative “harp” piece that rests on top of the bob and is riveted or screwed to it. You would need to remove the rivets to separate it from the bob. There are two holes on the back of this bob to reattach it, if necessary. The metal center rod on your pendulum should then slide through the slots on the back of the bob and then you can screw on your rating nut.