Rolex 278274 sio 31mm white Rolesor case comprised of Oystersteel and 18K white gold, screw-down back, screw-down crown with twinlock double waterproofness system, 18K white gold fluted bezel, scratch-resistant sapphire crystal with cyclops lens over the date, silver dial, index hour markers, Rolex calibre 2236 perpetual self-winding movement with date at 3 o'clock, approximately 55 hours of power reserve, Oystersteel Oyster bracelet with flat three-piece links, concealed folding Oysterclasp buckle.