Rolex
Deepsea
126660
The deep-diving Oystersteel titan, powered by Rolex's modern 3235 calibre.
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Overview
The Rolex Deepsea ref. 126660 is a professional diver's watch belonging to the storied Sea-Dweller line, housed in a 44 mm Oystersteel case engineered to withstand extreme underwater pressure. Introduced in 2018, it succeeded the ref. 116660 and brought with it the then-new Cal. 3235 movement, representing a meaningful generational step for the Deepsea family. Dial options spanning a bold solid black and the striking D-blue gradient kept the reference visually consistent with its immediate predecessor while signalling a refined mechanical interior.
History
The Sea-Dweller lineage stretches back to the late 1960s, when Rolex developed purpose-built saturation-diving watches in collaboration with professional diving organisations. The Deepsea sub-line, distinguished by its substantially thicker case and Ringlock System, was introduced in the mid-2000s as the most extreme expression of that heritage. Reference 126660 arrived in 2018 as the second generation of the Deepsea, its primary upgrade being the adoption of the Cal. 3235 — a movement featuring Rolex's Chronergy escapement and a roughly 70-hour power reserve. The reference remained in production into the early 2020s, occupying a firm place in the modern Rolex sport-watch canon.
Notable points
- The 44 mm Oystersteel case employs Rolex's patented Ringlock System — a nitrogen-hardened steel ring, titanium inner case, and domed sapphire crystal — rated to 3,900 metres (12,800 feet) of water resistance.
- Cal. 3235 introduced the Chronergy escapement, improving energy efficiency, and delivers approximately 70 hours of power reserve — a substantial advance over the movement it replaced.
- The D-blue dial, a gradient transitioning from deep black at the bottom to vivid blue at the top, was first introduced on the James Cameron-associated Deepsea Challenge concept and carried over to the production Deepsea line.
- At 44 mm in diameter and with a pronounced case thickness, the ref. 126660 sits at the larger, more tool-oriented end of the Rolex sport-watch spectrum, clearly prioritising function and legibility over dress-watch proportions.
- Reference 126660 succeeded the ref. 116660 solely through its movement upgrade to Cal. 3235, making the two generations externally near-identical — a distinction that matters considerably to collectors tracking the model's evolution.
