Patek Philippe Aquanaut Selfwinding Chronograph - 42.2 mm White Gold Case - Blue Dial - Midnight Blue Composite Strap - 5968G-00142. 2 mm white gold case, 11. 9 mm thick, sapphire crystal back, blue and black gradiant dial with embossed Aquanaut pattern and gold applied numerals with luminescent coating, caliber CH 28 520 C 528 self winding movement with flyback chronograph, central chronograph hand, 60 minute counter, date in an aperture, approximately 45 55 hours of power reserve, midnight blue composite material strap, Aquanaut fold over buckle. Water resistant to 120 m.