Rolex Sea-Dweller Deepsea 136660 — Blue Dial | Ringlock System

Built to Conquer the Abyss

Rolex’s Sea-Dweller Deepsea is the brand’s purest expression of extreme engineering—designed not for convenience, but for survival at crushing depths. Harnessing the revolutionary Ringlock System, this 44mm reference 136660 is certified to an astonishing 3,900m (12,800ft), transforming cutting-edge research into a wearable fortress.

The Architecture of Immense Pressure Resistance

• Reference Number: 136660
• The Ringlock System: A reinforced architecture that distributes immense external pressure across a nitrogen-alloyed steel central ring for unparalleled case integrity.
• Depth Rating: 3,900m / 12,800ft
• Domed Sapphire Crystal: Ultra-thick, highly domed sapphire engineered to withstand the stresses of deep saturation dives.
• Helium Escape Valve (HEV): Automatic gas release during decompression, safeguarding the crystal and seals.
• Titanium Caseback: Grade 5 titanium alloy for strength and flex under pressure without deformation.
• Case Diameter: 44mm
• Case and Bracelet Material: Oystersteel (stainless steel)
• Dial: D-Blue gradient from blue to black, echoing the descent into the abyss
• Bezel: Unidirectional rotatable with black Cerachrom ceramic insert and corrosion-resistant engraved scale
• Movement: Calibre 3235 automatic with approximately 70-hour power reserve
• Luminescence: Chromalight display for long-lasting blue emission
• Clasp: Oysterlock safety clasp with Glidelock extension system for precise, tool-free sizing
• Includes: Box, Warranty Card, Watch Case, Manual
• Condition: Good

Beyond any real-world requirement, the Deepsea’s capabilities are a statement of intent—Rolex building not just a dive watch, but a pressure-resistant instrument that redefines the limits of wearable engineering.

A Triumph of Material Science

From ceramic, titanium, and Oystersteel to the proprietary Ringlock architecture, every component serves a single objective: absolute reliability in the most hostile environment on Earth. The Deepsea 136660 is a technical manifesto—over-engineered for peace of mind, and the benchmark for modern saturation-diving instruments.

This Watch is Ideal For...

• The collector who values cutting-edge material science and uncompromising engineering.
• The individual seeking the most robust, capability-driven timepiece in the professional-diver category.
• Admirers of deep-sea exploration who want a wristwatch that truly goes beyond human limits.