Here's a fun pair of horse racing themed cufflinks dating from around the 1950's. They are not made of precious metal, but they are made very well. The front is a black glass intaglio of a race horse and jockey on the track. It's nice that the two cufflinks are made as a pair - there is a left one and a right one, as you can see by the rim on either side. They measure 3/4" across the front. The condition is very good.
If you like horse racing, I'm betting you will like these.
Horse Racing Glass Intaglio Cufflinks - Mid Century