Rolex Oyster Perpetual Day-Date 40 Watch. 40mm 18K yellow gold case, screw-down back with Rolex fluting, screw-down crown with twinlock double waterproofness system, fluted bezel, scratch-resistant double anti-reflective sapphire crystal with cyclops lens over the date, black diagonal motif dial, index hour markers with Chromalight, Rolex calibre 3255 automatic movement with centre hour, minute and seconds hands, instantaneous day and date in apertures, unrestricted rapid-setting, and stop-seconds for precise time setting, approximately 70 hours of power reserve, President bracelet with three-piece solid links comprised of a polished center link, satin-finished outer links, and ceramic inserts, concealed folding Crownclasp buckle. Waterproof to 100 meters.