Nicknamed the “Jumbo,” it wears as the largest Aquanaut Patek Philippe makes, and the khaki green colorway trades the usual blue for something with an outdoorsy, military mood. Green Aquanauts carry a devoted following, so this khaki example lands with the collector who likes a sports Patek that leans a little off the beaten path. A white gold case keeps it quiet on the wrist, the kind of stealthy pick that rewards the person who already owns the obvious ones.

Presents itself in mint condition with little to no signs of wear. Embossed with the signature Aquanaut grid, the khaki green dial catches the light across its raised checkerboard so the texture comes alive as the wrist moves. Framed by a rounded octagonal bezel in 18k white gold, the mirror polish and soft satin finish flash and calm with every turn of the wrist. Viewed through the sapphire caseback, a solid gold rotor sweeps over the movement and shows the Calatrava cross in warm gold.

Functions include hours, minutes, seconds, and date. Powering everything is the self‑winding caliber 26‑330 S C, a movement that holds up to 45 hours of power reserve and carries the Patek Philippe Seal, with a screw‑down crown rated by Patek to 30 meters of water resistance. Waking it from a long rest starts at the screw‑down crown on the right side of the case, which unscrews so you can give it a good forty turns to build up reserve. Pulled out one stop, the crown quick sets the date, so begin by moving it to the day before today. Pulled out to the next stop, the crown stops the seconds hand and moves the time, so run the hands forward past midnight to bring the date to today, then continue to the correct hour and minute before pushing the crown home and screwing it back down.

Comes as a full set, boxed with warranty documentation.

Rooted in Patek’s casual, sporty side, the Aquanaut grew into an icon, and the “Jumbo” takes that easygoing spirit and sizes it up in precious metal. Made for the collector who wants a Patek with a quieter kind of cool, it rewards a closer look more than a quick glance. Anyone chasing a modern sports Patek with real wrist presence will want to spend a long minute with this one.