RL Deepsea 44mm, Oystersteel Ref. 136660

RL Deepsea 44 – Oystersteel – Ref. 136660

The RL Deepsea Ref. 136660 represents the pinnacle of professional diving watches, merging cutting-edge engineering with RL’s legendary precision and robustness. Crafted from corrosion-resistant Oystersteel and housed in a 44 mm Oyster case, this watch is engineered to endure the extreme pressures of the deep ocean while maintaining everyday elegance.

Its iconic D‑Blue gradient dial, transitioning from intense blue to deep black, honors James Cameron’s historic solo dive to the Mariana Trench. Large Chromalight markers and hands ensure maximum legibility in total darkness, while the unidirectional rotatable bezel with black Cerachrom insert allows precise dive-time measurement.

At the heart of the Deepsea is the RL Calibre 3235, an automatic movement boasting 70 hours of power reserve, exceptional accuracy, and enhanced efficiency. Equipped with the Ringlock System, Triplock crown, and Helium Escape Valve, this watch offers water resistance up to 3,900 meters / 12,800 feet, making it a true professional diver’s instrument.

The Oyster bracelet with Oysterlock Glidelock clasp and Fliplock extension allows tool-free adjustment — even over wetsuits — combining practicality with comfort for daily wear.

✅ Technical Specifications

• Model: RL Deepsea

• Reference: 136660

• Case Material: Oystersteel (904L stainless steel)

• Case Diameter: 44 mm

• Case Thickness: Approx. 17.7 mm

• Bezel: Unidirectional rotatable, black Cerachrom ceramic insert with platinum-coated numerals

• Dial: D-Blue gradient (blue to black), large Chromalight markers and hands with long-lasting luminescence

• Crystal: 5.5 mm domed sapphire, scratch-resistant

• Water Resistance: 3,900 m / 12,800 ft (Ringlock System, Triplock crown, Helium Escape Valve)

• Movement: RL Calibre 3235, perpetual, self-winding mechanical

• Power Reserve: ~70 hours

• Functions: Hours, minutes, seconds; instantaneous date; stop-seconds

• Oscillator: Blue Parachrom hairspring, anti-magnetic

• Shock Absorption: Paraflex system

• Bracelet: Oyster, three-piece solid links in Oystersteel

• Clasp: Oysterlock safety clasp with Glidelock + Fliplock extension

• Certification: Superlative Chronometer (COSC + RL in-house post-casing)

• Lug Width: 21 mm

• Lug-to-Lug: Approx. 52 mm

Why Choose the RL Deepsea 136660?

• Engineered for extreme-depth diving with 3,900 m water resistance

• Iconic D‑Blue gradient dial, inspired by Mariana Trench dive

• Powerful Calibre 3235 with 70-hour power reserve

• Professional features: Ringlock System, Triplock crown, Helium Escape Valve

• Comfortable Oyster bracelet with Glidelock + Fliplock, adaptable even over wetsuits