Rolex YachtMaster 40mm watch, round 18kt yellow gold case (40mm diameter, 13mm thickness) with shoulders to protect the screw-down Triplock winding crown, special time-lapse rotatable 18kt yellow gold bezel, adjustable 18kt yellow gold Oysterlock bracelet, white dial with luminous hour markers, date calendar at 3 o'clock, 31 jewel Caliber 3135 self-winding Oyster Perpetual chronometer movement, scratch-resistant sapphire crystal, water-resistant to 100 meters.