Pierce the darkness
This Oyster Perpetual Explorer II in Oystersteel with an Oyster bracelet features a black dial with an arrow-shaped 24-hour hand and hour markers with a Chromalight display.
24-Hour Bezel
Reliability in the toughest conditions
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.
Black dial
Distinguishing day from night
The Explorer II features a date display, an additional orange 24-hour hand and a fixed bezel with 24-hour graduations, enabling day to be distinguished from night.
It became the watch of choice for speleologists, volcanologists and polar explorers. Its hour markers and hands feature a highly-legible Chromalight display with long-lasting blue luminescence.
Oystersteel
Highly resistant to corrosion
Rolex uses Oystersteel for its steel watch cases. Specially developed by the brand, Oystersteel belongs to the 904L steel family, alloys 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.
The Oyster bracelet
Alchemy of form and function
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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Model case
Oyster, 42 mm, Oystersteel
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Oyster architecture
Monobloc middle case, screw-down case back and winding crown
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Diameter
42 mm
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Material
Oystersteel
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Bezel
Fixed, 24-hour graduated
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Winding crown
Screw-down, Twinlock double waterproofness system
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Crystal
Scratch-resistant sapphire, Cyclops lens over the date
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Water resistance
Waterproof to 100 metres / 330 feet
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Movement
Perpetual, mechanical, self-winding, GMT function
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Calibre
3285, Manufacture Rolex
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Precision
-2/+2 sec/day, after casing
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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
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Oscillator
Paramagnetic blue Parachrom hairspring. High-performance Paraflex shock absorbers
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Winding
Bidirectional self-winding via Perpetual rotor
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Power reserve
Approximately 70 hours
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Bracelet
Oyster, three-piece solid links
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Material
Oystersteel
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Clasp
Folding Oysterlock safety clasp with Easylink 5 mm comfort extension link
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Dial
Black
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Details
Highly legible Chromalight display with long-lasting blue luminescence
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Certification
Superlative Chronometer (COSC + Rolex certification after casing)