Aquanaut

The Patek Philippe Aquanaut 5164 is a larger and more complicated version of Patek's casual sports watch. It features an automatic movement with dual time zone. Mechanical self-winding movement Caliber 324 S C FUS Aquanaut Travel Time Dual time zone mechanism indicating local and home time Local and "home" day/night indication in apertures Local date by hand Sweep seconds hand Black embossed dial, gold applied numerals, and luminescent hour markers "Tropical" composite strap Aquanaut fold-over clasp Screw-down crown Sapphire-crystal case back Water resistant to 120 m Steel Case diameter (10-4 o'clock): 40.8 mm

The Last Family-Owned Independent Genevan Watch Manufacturer. 

Since 1839 without interruption, Patek Philippe has been perpetuating the tradition of Genevan watchmaking. As the last family-owned independent watch manufacturer in Geneva, it enjoys total creative freedom to entirely design, produce and assemble what experts agree to be the finest timepieces in the world – following the vision of its founders Antoine Norbert de Patek (1839) and Adrien Philippe (1845). The company name became Patek Philippe in 1851, and it is under this name that Patek Philippe created the first Swiss wristwatch ever made in 1868.Thanks to its exceptional know-how, Patek Philippe maintains a tradition of innovation hailed by an impressive repertoire of more than 100 patents.