• Model case

  Oyster, 40 mm, Oystersteel

• Oyster architecture

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

• Diameter

  40 mm

• Material

  Oystersteel

• Bezel

  Black monobloc Cerachrom bezel in ceramic with moulded tachymetric scale

• Winding crown

  Screw-down, Triplock triple waterproofness system

• Crystal

  Scratch-resistant sapphire

• Water resistance

  Waterproof to 100 metres / 330 feet

Movement

• Movement

  Perpetual, mechanical chronograph, self-winding

• Calibre

  4131, manufacture Rolex

• Precision

  -2/+2 sec/day, after casing

• 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

• Winding

  Bidirectional self-winding via Perpetual rotor

• Power reserve

  Approximately 72 hours

Bracelet

• Bracelet

  Oyster, three-piece solid links

• Material

  Oystersteel

• Clasp

  Folding Oysterlock safety clasp with Easylink 5 mm comfort extension link

Dial

• Dial

  Black, steel counter rings

• Details

  Highly legible Chromalight display with long-lasting blue luminescence

Certification

• Certification

  Superlative Chronometer (official chronometer certification + Rolex certification after casing)