Model case

Crystal

Scratch-resistant sapphire, Cyclops lens (2.5x) over the date

Water-resistance

Waterproof to 100 metres / 330 feet

Model case

Oyster, 42 mm, steel

Bezel

Fixed, 24-hour graduated

Diameter

42 mm

Winding crown

Screw-down, Twinlock double waterproofness system

Oyster architecture

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

Material

904L steel

Movement

Calibre

3187, Manufacture Rolex

Model case

Perpetual, mechanical, self-winding, 24-hour hand

Oscillator

Paramagnetic blue Parachrom hairspring. High-performance Paraflex shock absorbers

Winding

Bidirectional self-winding via Perpetual rotor

Precision

Officially certified Swiss chronometer (COSC)

Functions

Centre hour, minute and seconds hands. 24-hour display. Second time zone with independent rapid setting of the hour hand. Instantaneous date. Stop-seconds for precise time setting

Bracelet

Clasp

Folding Oysterlock safety clasp with Easylink 5 mm comfort extension link

Bracelet material

904L steel

Bracelet

Oyster, flat three-piece links

Dial

Details

Highly legible Chromalight display with long-lasting blue luminescence

Dial

White

Extreme environments, such as the polar regions, have always been real-life proving grounds for Oyster watches. The Explorer II is natural heir to the Explorer as a reliable guide, a tool and a companion for explorers, speleologists and vulcanologists. When it was launched in 1971, the Explorer II set new standards for chronometric precision, strength, autonomy and clarity. It features a distinctive 24-hour hand, an invaluable aid to distinguish daytime hours from night around the poles and beneath ground.