Explorer II

explorer
Oyster, 42 mm, Oystersteel
Configure

Watch Features

For extreme resistance

Oystersteel

Rolex uses Oystersteel for its steel watch cases. Specially developed by the brand, Oystersteel belongs to the 904L steel family, superalloys most commonly used in high-technology and in the aerospace and chemical industries, where maximum resistance to corrosion is essential. Oystersteel is extremely resistant, offers an exceptional finish once polished and maintains its beauty even in the harshest environments.

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Black Dial

On the black-dial version of the Explorer II, the black base of the hands blend with the dial to create a “phantom” effect in which they seem to float over the dial – a nod to the 1971 model.

The Oyster bracelet

The Oyster bracelet is a perfect alchemy of form and function, aesthetics and technology, designed to be both robust and comfortable. It is equipped with an Oysterlock folding clasp, which prevents accidental opening and the Easylink comfort extension link, also exclusive to Rolex. This ingenious system allows the wearer to increase the bracelet length by approximately 5 mm, providing additional comfort in any circumstance.

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3187 Movement

The Explorer II is equipped with calibre 3187, a self-winding mechanical movement entirely developed and manufactured by Rolex. In addition to the conventional hour, minute and seconds hands, it features a 24-hour hand to display a second time zone. The 3187 is fitted with a Parachrom hairspring and Paraflex shock absorbers, offering greater resistance to shocks and to extreme conditions. Like all Rolex Perpetual movements, the 3187 is a certified Swiss chronometer, a designation reserved for high-precision watches that have successfully passed the Swiss Official Chronometer Testing Institute (COSC) tests. Its architecture, in common with all Oyster watch movements, makes it singularly reliable.

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24-hour bezel

The Explorer II is equipped with an additional 24-hour display; a dedicated hand circles the dial in 24 hours rather than the usual 12, pointing to a fixed bezel with 24 hour graduations. This function enables the wearer to distinguish the hours of the day from the hours of the night, an essential feature for those who venture into environments where darkness reigns supreme – such as in the depths of caves, or where the sun never sets – like the polar regions in summer.

Specifications

Reference 216570
Model case
Model case
Oyster, 42 mm, Oystersteel
Oyster architecture
Monobloc middle case, screw-down case back and winding crown
Diameter
42 mm
Material
Oystersteel
Bezel
Fixed, 24-hour graduated
Winding crown
Screw-down, Twinlock double waterproofness system
Crystal
Scratch-resistant sapphire, Cyclops lens over the date
Water-resistance
Waterproof to 100 metres / 330 feet
Movement
Movement
Perpetual, mechanical, self-winding
Calibre
3187, Manufacture Rolex
Precision
-2/+2 sec/day, after casing
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
Oscillator
Paramagnetic blue Parachrom hairspring. High-performance Paraflex shock absorbers
Winding
Bidirectional self-winding via Perpetual rotor
Power reserve
Approximately 48 hours
Bracelet
Bracelet
Oyster, flat three-piece links
Bracelet material
Oystersteel
Clasp
Folding Oysterlock safety clasp with Easylink 5 mm comfort extension link
Dial
Dial
Black
Details
Highly legible Chromalight display with long-lasting blue luminescence
Certification
Superlative Chronometer (COSC + Rolex certification after casing)