Meant for the deepest parts of the ocean, the Rolex Sea-Dweller Deepsea ref. 126660 utilizes the patented Ringlock System to manage extreme pressure. A nitrogen-alloyed steel compression ring fitted inside the case absorbs the immense force of water pressure, allowing the watch to withstand depths of 3,900 meters (12,800 feet). The Oystersteel case, thick sapphire crystal, and grade 5 titanium caseback work together with this internal framework to ensure mechanical integrity.Chromalight markers and hands glow blue in the dark, ensuring legibility in total blackness. Beneath the dial sits the self-winding Caliber 3235, delivering precision timekeeping and a 70-hour power reserve.
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