Rolex 136660 Black

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, Twinlock double 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, flat three-piece links

BRACELET MATERIAL

Oystersteel

CLASP

Folding Oysterlock safety clasp with Rolex Glidelock extension system

DIAL

Black

DETAILS

Highly legible Chromalight display with long-lasting blue luminescence