These cufflinks are marked "CHRISTIAN DIOR 12K GF" on the back and along the arm of the cufflink, as well as two patent numbers.  Also marked 1/20 12K GF.  The oval centers appear to be jade which is bezel set into the cufflink that measures 1" x just shy of 3/4".  There is minor scuffing on the back and they could stand bit of a cleaning, but I always leave that to the buyer (unless you specify otherwise).  Overall condition is very good.