Rolex Yellow Gold Datejust 31 Watch - Domed Bezel - Malachite Diamond Six and Nine Dial - Oyster Bracelet - 278248 madr69o31mm 18K yellow gold case, screw down crown with twinlock double waterproofness system, domed bezel, scratch resistant sapphire crystal with cyclops lens over the date, malachite diamond Roman IV and IX dial, diamonds set VI and IX, Rolex calibre 2236 automatic movement with center hour, minute and seconds hands, instantaneous date with rapid setting, and stop seconds for precise time setting, approximately 55 hours of power reserve, 18K yellow gold