Rolex Day-Date President watch, polished round platinum case with screw-down Twinlock winding crown, polished domed platinum bezel, platinum President bracelet with solid links and hidden clasp, silver rhodium dial with applied silver Roman numerals, day calendar at 12 o'clock, date calendar at 3 o'clock, 31 jewel Caliber 3155 self-winding mechanical Oyster Perpetual COSC certified chronometer movement, scratch-resistant sapphire crystal, water-resistant to 100 meters.