ROLEX SEA-DWELLER DEEPSEA D-BLUE REF. 136660-0003 44MM OYSTERSTEEL 390ATM, SELF-WINDING CALIBER 3235

Model case
Oyster, 44 mm, Oystersteel
Oyster architecture
Monobloc middle case, screw-down case back and winding crown. Rolex Ringlock System case architecture with Helium escape valve
Diameter
44 mm
Material
Oystersteel
Bezel
Unidirectional rotatable 60-minute graduated, scratch-resistant Cerachrom insert in ceramic, numerals and graduations coated in platinum
Winding crown
Screw-down, Triplock triple waterproofness system
Crystal
Domed, 5.5 mm-thick scratch-resistant sapphire
Water resistance
Waterproof to 3,900 metres / 12,800 feet, helium escape valve

Movement
Perpetual, mechanical, self-winding
Calibre
3235, Manufacture Rolex
Precision
-2/+2 sec/day, after casing
Functions
Centre hour, minute and seconds hands. Instantaneous date with rapid setting. Stop-seconds for precise time setting
Oscillator
Paramagnetic blue Parachrom hairspring. High-performance Paraflex shock absorbers
Winding
Bidirectional self-winding via Perpetual rotor
Power reserve
Approximately 70 hours

Bracelet
Oyster, three-piece solid links
Material
Oystersteel
Clasp
Folding Oysterlock safety clasp with Rolex Glidelock extension system

Dial
D-blue
Details
Highly legible Chromalight display with long-lasting blue luminescence

Certification
Superlative Chronometer (COSC + Rolex certification after casing)