MasterHorologer

Rolex Oyster Perpetual Explorer II New Reference 226570-0001 (with 42mm Oystersteel case and white lacquer dial)

Rolex presents a new-generation Oyster Perpetual Explorer II with a redesigned Oystersteel case and bracelet. On the white lacquer dial, the hour markers – whose black coating is applied using PVD (Physical Vapour Deposition) – and the black lacquer hour, minute and seconds hands stand out for their matt finish. The 24-hour hand retains its characteristic orange hue, which is the same colour as the Explorer II inscription that has featured on the dial since 2011.

The new-generation Explorer II also benefits from an optimized Chromalight display. In dark conditions, the intensity of the blue glow emitted by the hour markers and hands now lasts longer thanks to the innovative and exclusive luminescent material with which they are filled or coated. In daylight, these display elements also have a brighter white hue.

Thanks to its 24-hour display comprising an additional, orange hour hand and an engraved bezel, the Explorer II allows the wearer to clearly distinguish daytime from night-time hours. This is particularly useful in areas where it is difficult or even impossible to distinguish between day and night, such as underground or in Polar Regions, which experience six months of daylight and six months of darkness a year. In certain conditions, this display enables the watch to serve as a compass. The 24-hour display can also be used to show a second time zone.

The 42 mm Oyster case of the new generation Explorer II is guaranteed waterproof to a depth of 100 metres (330 feet). Its middle case is crafted from a solid block of Oystersteel, a particularly corrosion-resistant alloy. The case back, edged with fine fluting, is hermetically screwed down with a special tool that allows only Rolex watchmakers to access the movement.

The Twinlock winding crown, fitted with a double waterproofness system and protected by an integral crown guard, screws down securely against the case. The crystal is made of virtually scratchproof sapphire and is fitted with a Cyclops lens at 3 o’clock for easy reading of the date. The waterproof Oyster case provides optimum protection for the watch’s movement.

The new-generation Explorer II is equipped with calibre 3285, a movement entirely developed and manufactured by Rolex that was released in 2018 and is fitted on this model from 2021. This self-winding mechanical movement led to the filing of several patents, and offers outstanding performance in terms of precision, power reserve, resistance to shocks and magnetic fields, convenience and reliability.

Calibre 3285 incorporates the Chronergy escapement patented by Rolex, which combines high energy efficiency with great dependability. Made of nickel-phosphorus, it is also insensitive to magnetic fields. The movement is fitted with an optimized blue Parachrom hairspring, manufactured by Rolex in a paramagnetic alloy that makes it up to 10 times more precise than a traditional hairspring in case of shocks.

The blue Parachrom hairspring is equipped with a Rolex overcoil, ensuring the calibre’s regularity in any position. The oscillator is fitted on the Rolex-designed and -patented high-performance Paraflex shock absorbers, increasing the movement’s shock resistance.

Calibre 3285 is equipped with a selfwinding module via a Perpetual rotor. Thanks to its barrel architecture and the escapement’s superior efficiency, the power reserve of calibre 3285 extends to approximately 70 hours.

The new-generation Explorer II is fitted with an Oyster bracelet. Developed at the end of the 1930s, this three-piece link bracelet is known for its robustness. The Oyster bracelet on this new watch features the Rolex-designed and -patented Oysterlock folding safety clasp, which prevents accidental opening. It is also equipped with the Easylink comfort extension link, developed by the brand, which allows the wearer to easily adjust the bracelet length by approximately 5 mm. In addition, a concealed attachment system ensures seamless visual continuity between the bracelet and case.

Like all Rolex watches, the Oyster Perpetual Explorer II is covered by the Superlative Chronometer certification redefined by Rolex in 2015.

Technical details

Model: Oyster Perpetual Explorer II
Reference: 226570-0001

Case reference: 226570
Bracelet reference: 78KB00

Case
Oyster (monobloc middle case, screw-down case back and winding crown)
Safety: Integral crown guard
Diameter: 42 mm
Material: Oystersteel
Middle case: Oystersteel, satin finish with polished sides
Bezel: Oystersteel, 24-hour graduated; engraved graduations and numerals, black coating via electrolytic technique
Case back: Oystersteel, solid, screw-down with fine fluting
Winding crown: Twinlock in Oystersteel, screw-down, double waterproofness system
Crystal: Scratch-resistant sapphire with anti-reflective coating; Cyclops lens over the date with double anti-reflective coating
Waterproofness: 100 metres (330 feet)

Movement
Calibre 3285, Manufacture Rolex
Mechanical movement with bidirectional self-winding via Perpetual rotor
Precision: −2 /+2 sec/day, after casing

Oscillator
• Frequency: 28,800 beats/hour (4 Hz)
• Paramagnetic blue Parachrom hairspring
• Rolex overcoil
• Large balance wheel with variable inertia
• High-precision regulating via four gold

Microstella nuts
• Traversing balance bridge
• High-performance Paraflex shock absorbers

Escapement
• Chronergy with optimized energy efficiency
• Paramagnetic nickel-phosphorus pallet fork and escape wheel

Jewelling
• 31 rubies

Power reserve
• Approximately 70 hours

Functions
Centre hour, minute and seconds hands; independent rapid-setting of the hour hand
Time shown by conventional hands and in 24-hour format via additional 24-hour hand (day/night distinction)
OR
Local time via conventional hands, reference time via additional 24-hour hand
Instantaneous date at 3 o’clock, secure setting via the hour hand
Stop-seconds for exact time setting

Dial
White lacquer
Matt hour markers in 18 ct white gold, black coating via PVD (Physical Vapour Deposition), highly legible Chromalight (long-lasting luminescence, blue glow)
Hands in 18 ct white gold, coated with matt black lacquer except the 24-hour hand, which is coated with orange lacquer, highly legible Chromalight (long-lasting luminescence, blue glow)

Bracelet
Oyster, three-piece solid links
Oystersteel, satin finish with polished edges
Oysterlock folding safety clasp
Easylink comfort extension link (approx. 5 mm)

Certification
Superlative Chronometer (COSC + Rolex certification after casing)
International five-year guarantee

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