40mm 18K yellow gold case, screw-down back, end pieces set with diamonds, screw-down crown with triplock triple waterproofness system, diamond bezel, scratch-resistant sapphire crystal scratch-resistant sapphire, golden dial 8 baguette-cut diamond-set hour markers, 3 diamond-set hour markers at 3, 6 and 9 o'clock., 4131, manufacture Rolex perpetual, mechanical chronograph, self-winding movement with, approximately 72 hours of power reserve, Oyster bracelet with three-piece solid links, folding Oysterlock safety buckle with Easylink 5mm comfort extension link. Waterproof to 100 metres / 330 feet.