Rolex Yellow Gold Cosmograph Daytona 40 Watch - Mother-Of-Pearl Diamond Dial - 116508 md40mm 18K yellow gold case, screw down back, screw down crown and push buttons with Triplock triple waterproofness, fixed 18K yellow gold bezel with engraved tachymetric scale, scratch resistant sapphire crystal, mother of pearl dial, diamond hour markers, Rolex calibre 4130 self winding movement with chronograph central second hand, 30 minute counter at 3 o'clock, and 12 hour counter at 9 o'clock, approximately 72 hours of power reserve, 18K yellow