This Patek Philippe Ref# 5164A-001 is complete with original certificate of origin, and box. This example is mint and dated 2014
The 5164 Aquanaut Dual Time automatic watch, features a 40.8 mm case. This is a stainless steel example with black dial and stainless deployment buckle. Functions include hours, minutes, seconds, dual time zone mechanism indicating local and home time, local and "home" day/night indications in apertures and local date by hand.
In 2011 Patek Philippe launched of the coolest Aquanaut to date, the Aquanaut Travel Time 5164A. It is the first Aquanaut that has a complication. The 5164A is a sport watch with a second-timezone function shown by a second hour hand and two apertures on the dial that indicate whether you are reading local or home time.