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The Rolex Deepsea Ref. 136660 is a professional-grade dive watch engineered for extreme underwater conditions. Featuring a black dial, Cerachrom bezel, and Ringlock System case, it represents one of the most technically advanced models in Rolex’s diving lineup.
General Specifications
• Reference: 136660
• Collection: Deepsea
• Case Size: 44 mm
Case
• Material: High-quality plated metal.
• Construction: Monobloc middle case, screw-down case back
• Architecture: Rolex Ringlock System with helium escape valve
• Bezel: Unidirectional rotatable 60-minute graduated bezel with black Cerachrom insert
• Crown: Screw-down Triplock system
• Crystal: Domed sapphire (approx. 5.5 mm thick)
Movement
• Type: Self-winding automatic (Perpetual)
• Calibre: Rolex 3235
• Power Reserve: Approximately 70 hours
• Accuracy: −2/+2 seconds per day
• Technology: Chronergy escapement, Parachrom hairspring, Paraflex shock absorbers
Functions
• Hours, minutes, seconds
• Date display at 3 o’clock
• Instantaneous date with rapid setting
• Stop-seconds for precise time setting
Dial
• Color: Black
• Finish: Matte / high-legibility diver layout
• Hour Markers: Large luminous markers (Chromalight)
• Feature: Optimized readability in low-light underwater conditions
Bracelet
• Type: Oyster (three-piece links)
• Clasp: Oysterlock safety clasp with Glidelock extension
Technical Notes
• Water-resistant to 3,900 meters with helium escape valve
• Ringlock System ensures extreme pressure resistance
• Cerachrom bezel is highly scratch-resistant and UV-stable
• Designed specifically for professional deep-sea diving
• Basic, suitable for wearing while showering or in light rain. Not recommended for swimming or diving.
