Rolex · Family: Sea-Dweller Deepsea
The Rolex Sea-Dweller Deepsea 126660 is Rolex's extreme dive watch, with a 44mm Oystersteel case and a certified 3,900-meter water resistance thanks to the Ringlock system. It runs the in-house Caliber 3235 with ~70 hours of power reserve. Cazador has no verified price observations yet (n=0). Its standout detail: alongside the rest of the Deepsea line, it's the only Rolex certified for depths of nearly 4 km, a margin far beyond any recreational diving use.
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The Sea-Dweller Deepsea launched in 2008 as Rolex's answer to the need for a dive watch able to accompany saturation-diving teams at depths far beyond the standard Sea-Dweller's range. The technical key that made it possible was the Ringlock system: a case architecture built from a central ring of high-strength nitrogen-alloyed steel, a 5.5mm-thick convex sapphire crystal, and a titanium case back, engineered to resist pressure without excessively increasing overall case thickness.
In 2018, at Baselworld, Rolex introduced the current generation under reference 126660, which brought in the in-house Caliber 3235 — with a Chronergy escapement and roughly 70 hours of power reserve — replacing the first generation's Caliber 3135, while also slightly reducing case thickness versus the original 2008 model.
With a certified water resistance of 3,900 meters, the Deepsea exceeds recreational diving's maximum operating depth more than tenfold, a safety margin that reflects its origin as a tool for professional saturation diving rather than any practical need of the everyday wearer.
Like the rest of Rolex's dive range, it includes a helium escape valve that releases gas accumulated inside the case during decompression in hyperbaric chambers, preventing internal pressure from damaging the crystal.
Cazador has no verified price observations for this reference (n=0 as of today). We do not publish estimates without our own sourced market data.
The case architecture that lets the Deepsea withstand extreme pressure: a central nitrogen-alloyed steel ring, a 5.5mm convex sapphire crystal, and a titanium case back, without requiring an excessively thick case.
A certified 3,900 meters, far beyond recreational diving needs, since its origin lies in professional saturation diving.
The Deepsea has a larger, thicker case with the Ringlock system, engineered for much greater water resistance (3,900 m versus the standard Sea-Dweller's 1,220 m).
The in-house Caliber 3235, automatic, with a Chronergy escapement and roughly 70 hours of power reserve, introduced with this reference in 2018.
It releases helium that has built up inside the case during saturation dives in hyperbaric chambers, preventing internal pressure from damaging or popping off the crystal during decompression.