Rolex CosmographDaytona

Model case：Oyster, 40 mm, yellow gold

Oyster architecture：Monobloc middle case, screw-down case back and winding crown

Diameter：40 mm

Material：18 ct yellow gold

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：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：Oysterflex

Material：Flexible metal blades overmoulded with high-performance elastomer

Clasp：Folding Oysterlock safety clasp with Rolex Glidelock extension system

Dial：Golden, black counter rings

Details：Highly legible Chromalight display with long-lasting blue luminescence

Certification：Superlative Chronometer (COSC + Rolex certification after casing)