Rolex Deepsea 136660 | Ringlock System — Saturation Dive Watch

Built to Conquer the Abyss

Rolex’s Sea-Dweller Deepsea is engineering at its most uncompromising, conceived to master pressures far beyond the limits of human endurance. In the 136660 reference, Rolex refines its most extreme professional diver with quiet, relentless innovation—anchored by the revolutionary Ringlock System and a depth rating that borders on the unbelievable.

The Architecture of Immense Pressure Resistance

• Reference Number: 136660
• The Ringlock System: A multi-component architecture that fortifies the case to withstand immense external pressure, uniting a reinforced central structure, ultra-thick crystal, and a resilient metal caseback.
• Depth Rating: 3,900m / 12,800ft
• Domed Sapphire Crystal: Extra-thick, high-domed sapphire designed to endure crushing depths without distortion.
• Helium Escape Valve: Automatic HEV safeguards the movement during decompression, ensuring stable performance after saturation dives.
• Titanium Caseback: Robust titanium alloy caseback engineered to manage extreme loads while maintaining comfort on the wrist.
• Case and Bezel: 44 mm Oystersteel case with unidirectional Cerachrom bezel insert for precise, corrosion-resistant timing.
• Movement: Rolex Manufacture Calibre 3235 with Chronergy escapement, approximately 70-hour power reserve; Superlative Chronometer precision (−2/+2 sec/day, after casing).
• Dial and Legibility: Black dial with Chromalight display for long-lasting, blue-emission visibility in the darkest depths.
• Bracelet and Clasp: Oyster bracelet in Oystersteel with Oysterlock safety clasp and Glidelock micro-adjustment for tool-free sizing.

Deepsea is Rolex’s promise kept to physics itself—a watch whose capability surpasses human need by design. It is the distilled proof that when engineering is pushed to the extreme, confidence follows.

Over-Engineered for Absolute Peace of Mind

From the domed crystal to the titanium caseback, every element of the Deepsea is a studied response to pressure and time. It is a technical statement of dominance—resilient, precise, and ready for the most hostile environments on Earth. Whether you dive or simply demand the best, this is the apex of Rolex’s tool-watch philosophy.

This Watch is Ideal For…

• The collector who appreciates cutting-edge material science and purpose-driven design.
• The individual seeking the most robust, capable timepiece for any environment.
• The professional or enthusiast who values absolute reliability and overbuilt assurance.