Steel Patek Philippe Nautilus 5980/1A-100. Case diameter 40.5mm (44mm across not including winding crown) water resistant to 120 meters. Automatic Patek Philippe Caliber CH 28-250 C, 35 jewels, 28,800 vph, between 45 and 55 hours power reserve. Column-wheel control of chronograph movement, rotor on zirconium oxide ball bearings, seal of Geneva. Functions, hours, minutes, sweep seconds, chronograph and date. Black-blue gradient dial with applied hour markers with luminescent coating. Brushed and polished steel bracelet with double folding clasp and safety. Our reference A1567.