Rolex 116518LN bkdof Cosmograph Daytona Watch. 40mm 18K yellow gold case, screw-down yellow gold back, screw-down crown and push buttons with Triplock triple waterproofness, black monobloc Cerachrom bezel with engraved tachymetric scale, scratch-resistant double anti-reflective sapphire crystal, black dial, 8 diamond hour markers, Rolex calibre 4130 perpetual self-winding movement with chronograph central second hand, 30-minute counter at 3 o'clock, and 12-hour counter at 9 o'clock, approximately 72 hours of power reserve, black Oysterflex strap made from flexible metal blades overmoulded with high-performance elastomer, Oysterlock folding safety buckle with Easylink 5mm rapid extension system. Waterproof to 100 meters.