Model case

Oyster, 40 mm, white gold

Material

18 kt white gold

Winding crown

Screw-down, Triplock triple waterproofness system

Oyster architecture

Monobloc middle case, screw-down case back and winding crown

Bezel

Crystal

Scratch-resistant sapphire, Cyclops lens over the date

Diameter

40mm

Water resistance

Waterproof to 100 metres / 330 feet

Movement

Perpetual, mechanical chronograph, self-winding

Functions

Centre hour and minute hands, small seconds hand at 6 o'clock. Chronograph via centre seconds hand, 30-minute counter at 3 o'clock and 12-hour counter at 9 o'clock. Stop seconds for exact time setting

Oscillator

Paramagnetic blue Parachrom hairspring. High-performance Paraflex shock absorbers

Calibre

4131, manufacture Rolex

Winding

Bidirectional self-winding via Perpetual rotor

Precision

-2/+2 sec/day, after casing

Power reserve

Approximately 72 hours

Bracelet

Oyster, three-piece solid links

Material

18 kt white gold

Dial

Green ceramic

Details

Highly legible Chromalight display with long-lasting blue luminescence

Certification

Superlative Chronometer (COSC + Rolex certification after casing)