31mm Oystersteel case, screw-down crown with twinlock double waterproofness system, domed bezel, scratch-resistant sapphire crystal, yellow dial, index hour markers, Rolex calibre 2232 automatic movement with center hour, minute and seconds hands, and stop-seconds for precise time setting, approximately 55 hours of power reserve, Oyster bracelet with flat three-piece links, folding Oysterclasp buckle with Easylink 5mm comfort extension link. Waterproof to 100 meters.