Looks like they were painted and turned into jewelry (cuff links?) by a UK jeweler. I doubt they have any numismatic value, but might sell on ebay to a jewelry enthusiast?
Few years ago I received a wristwatch with a 1 ozt silver bullion Panda as the face. I forget which year Panda it was, but it was pretty. Mounted coins like these are rarely worth anything to collectors. I kept it a few years and passed it on to another collector as a gift.