The Rolex Deepsea Ref. 126660, famously known as the “James Cameron” in honor of the filmmaker’s historic 2012 solo descent to the Mariana Trench, is a landmark of extreme engineering and a bold statement of modern horological prestige . This formidable 44mm stainless steel Oystersteel timepiece is purpose-built for the abyss, featuring Rolex’s patented Ringlock System and a helium escape valve to withstand an astonishing 3,900 meters (12,800 feet) of water resistance . The defining characteristic is its spectacular gradient “D-Blue” dial, which transitions from a deep, vivid blue at the center to a profound black at the edges, symbolizing the journey from the sunlit surface into the crushing darkness of the ocean’s depths . This distinctive dial is punctuated by the bright green “DEEPSEA” lettering, creating a striking contrast . Housing the watch is a unidirectional rotating bezel with a scratch-resistant black Cerachrom ceramic insert, a helium escape valve, and a black Cerachrom bezel insert . At its heart beats the advanced in-house automatic Caliber 3235, a Superlative Chronometer-certified movement that delivers an exceptional 70-hour power reserve and the patented Chronergy escapement for superior efficiency and precision . The watch is secured by a robust Oyster bracelet crafted from Oystersteel, featuring an Oysterlock safety clasp and the innovative Glidelock extension system, which allows for fine, tool-free adjustments of up to approximately 20mm to ensure a perfect, secure fit over a diving suit or on the wrist . Powering this feat of engineering is the automatic caliber 3235 movement, which provides the watch with a reliable 70-hour power reserve . Produced from 2018 to 2022, the reference 126660 succeeded the original 116660 and has itself been replaced by the 136660, cementing its place as a modern icon for collectors who demand both a narrative of exploration and the ultimate in dive watch technology . Key specifications: 44mm Oystersteel case; “D-Blue” gradient dial; black Cerachrom bezel; Caliber 3235 automatic movement; 70-hour power reserve; Oyster bracelet with Glidelock; 3,900m water resistance; sapphire crystal .