Rolex Sea-Dweller Deepsea 116660 | 44 mm SS | Ringlock & Helium Escape Valve

Built to Conquer the Abyss

The Sea‑Dweller Deepsea is Rolex engineering turned up to its absolute maximum, purpose-built for environments that defy human endurance. Anchored by the revolutionary Ringlock System, this 44 mm reference 116660 achieves an almost unimaginable depth rating of 3,900 meters (12,800 feet), a standard few instruments—let alone wristwatches—can approach.

Specifications of an Underwater Fortress

• Reference Number: 116660
• The Ringlock System: A nitrogen-alloyed steel central ring, 5.5 mm domed sapphire, and a titanium caseback create a compressive architecture that thrives under extreme pressure.
• Depth Rating (3,900m / 12,800ft): Certified performance at abyssal depths far beyond any practical diving scenario.
• Domed Sapphire Crystal: Ultra-thick, high-clarity sapphire engineered to withstand colossal loads.
• Helium Escape Valve: Automatically evacuates trapped gas during decompression to protect the integrity of the watch.
• Titanium Caseback: Lightweight, resilient Grade 5 titanium for superior strength-to-weight performance.
• Case Diameter and Material: 44 mm PVD Coated Stainless Steel Oyster case for commanding presence and durability.
• Bezel: Unidirectional Cerachrom ceramic insert with platinum‑filled numerals for lasting legibility.
• Movement: Rolex Calibre 3135 automatic, COSC‑certified precision.
• Bracelet and Clasp: PVD Coated Stainless Steel Oyster bracelet with Glidelock and Fliplock extensions for quick, tool‑free sizing over suits.
• Includes: Box and Papers.

The Curator’s Insight:
The Deepsea’s capability borders on the surreal—an horological monolith that shrugs off pressures found at the ocean’s blackest depths. It’s Rolex’s clearest statement that “impossible” is merely an engineering brief.

Over-Engineered for Absolute Peace of Mind

From the Ringlock’s armored architecture to its domed sapphire and titanium back, the Deepsea is a masterclass in material science and purposeful design. It is a tool conceived to outlast hostile environments—underwater, on land, and everywhere in between—delivering unwavering confidence whatever the conditions.

This Watch is Ideal For…

• The collector who appreciates cutting‑edge material science and purposeful over‑engineering.
• The individual seeking one of the most robust and capable timepieces ever made.
• The enthusiast who wants the definitive deep‑diving Rolex on the wrist.