Unlike most dual-time zone watches that appear overly complicated or purely technical, this masterpiece maintains a clean aesthetic while offering sophisticated functionality, making it truly unique in the market.

Presents itself in mint condition with little to no signs of wear. The case showcases alternating brushed and mirror-polished finishes, highlighting the Nautilus’s signature design with shifting textures as the angle of light changes. With its refined grey tone, the dial presents a nuanced gradient that moves between soft slate and brushed silver, revealing new dimensions with every glance.

Functions include hours, minutes, seconds, date, dual time zone, and day/night indicators. The screw-down crown on the right side can adjust the minute and hour hands. The pusher tool can be used to push in the top left pusher, which quickly sets the date. Press the upper pusher at 8 o’clock to move the local time hand forward in one-hour increments, and push the lower pusher at 10 o’clock to move the local time hand backward. The date and day/night indicators automatically synchronize with the local time.

Comes as a full set, double-boxed, including the watch pillow and a Patek Philippe binder containing the certificate of origin, Patek Philippe museum pamphlet, collector’s library booklet, authorized retail center booklet, pusher tool, hang tag, and a Aquanaut manual.

Unlike most dual time zone watches that prioritize either sportiness or elegance, the Aquanaut achieves both simultaneously, making it singularly versatile among luxury timepieces. For those who recognize true quality and craftsmanship without requiring obvious status symbols, the 5164A is a subtle and powerful addition to anyone’s collection.