Patek Philippe Aquanaut 'Advanced Research' 5650G Terminator

The Aquanaut Travel Time Ref. 5650G “Advanced Research” is a bold exploration of modern horological innovation housed in a familiar yet distinctive design. Encased in 18K white gold, the 40.8 mm x 11 mm case frames a navy-blue gradient “Tropical” dial that combines sporty elegance with technical flair. A standout feature is the semi-skeletonized dial aperture at 9 o’clock, revealing the new steel-based compliant mechanism for the Travel Time function. This minimalist, pivot-less system consolidates what was once a 37-part classical GMT assembly into 12 precision leaf springs, offering friction-free, lubricant-free operation that underscores Patek’s forward-looking engineering. The pushers on the left side control the local hour hand, advancing it in one-hour increments, while the finishing—brushed flat springs and chamfered steel edges—maintains the brand’s unmistakable craftsmanship.

Under the hood beats the automatic caliber 324 S C FUS, now equipped with a technically revised Spiromax® balance spring featuring an additional inner boss for enhanced isochronism and rate stability (+1/–2 seconds per day). The movement, visible through the sapphire caseback, runs at 28,800 vph with a 45-hour power reserve and includes full dual-time, day/night, and date functions. Limited to just 500 pieces and unveiled in 2017, the Ref. 5650G stands as a striking testament to Patek Philippe’s Advanced Research program, a harmonious blend of traditional watchmaking and boundary-pushing science that hints at the future of high-end horology.