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 movementCaliber 324 S C FUSAquanaut Travel TimeDual time zone mechanism indicating local and home timeLocal and “home” day/night indication in aperturesLocal date by handSweep seconds handBlack embossed dial, gold applied numerals, and luminescent hour markers”Tropical” composite strapAquanaut fold-over claspScrew-down crownSapphire-crystal case backWater resistant to 120 mSteelCase diameter (10-4 o’clock): 40.8 mm
