| Reference | 226570 |
| Material | Oystersteel |
| Diameter | 42 mm |
| Dial | Black |
| Power Reserve | Approximately 70 hours |
| Model Case | Oyster, 42 mm, Oystersteel |
| Oyster Architecture | Monobloc middle case, screw-down case back and winding crown |
| 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 |
| Calibre | 3285, Manufacture Rolex |
| Oscillator | Paramagnetic blue Parachrom hairspring. High-performance Paraflex shock absorbers |
| Escapement | Chronergy with optimized energy efficiency |
| Winding | Bidirectional self-winding via Perpetual rotor |
| Bracelet | Oyster, three-piece solid links |
| Bracelet Material | Oystersteel |
| Clasp | Folding Oysterclasp with Easylink 5 mm comfort extension link |
| Details | Highly legible Chromalight display with long-lasting blue luminescence |
| Certification | Superlative Chronometer (COSC + Rolex certification after casing) |
| STYLE | Men |
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.
Black dial
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
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.Model Availability
