This Patek is 40.5 mm stainless steel case, sapphire-crystal back, black gradated dial with luminescent coated gold applied numerals, caliber CH 28-520 C FUS self-winding movement Nautilus Travel Time Chronograph (chronograph with 60-minute counter, dual time zone mechanism indicating local and home time, local and home day/night indication in apertures, local date by hand, sweep seconds chronograph hand), approximately 45-55 hours of power reserve, stainless steel bracelet, Nautilus fold-over buckle. Water resistant to 120 m.