Description
Make a date of a day
This Oyster Perpetual Datejust 31 in Oystersteel features a bright black dial and an Oyster bracelet.
Bright black dial
Limitless freedom
Lacquer combines almost limitless freedom of colour with intensity and a smooth finish. The lacquering technique consists of successively depositing six thin layers of lacquer on a brass base plate. A colourless varnish is then applied to give the colour or shade all of its depth and shine. Once the varnish is dry, the surface of the dial is polished to magnify the colour; the dial is then ready to be pad printed and receive its appliques.
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 Oysterclasp 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.
The Cyclops lens
A magnifying lens
The Cyclops lens is one of the most distinctive Rolex features, and one of the most recognizable. Named after the one-eyed giant of Greek mythology, the Cyclops lens magnifies the watch’s emblematic date display for easy reading. Behind the Cyclops, as with every feature of a Rolex timepiece, lies a history of invention, research and development, and the endless search for perfection.
Specifications
| Brand | Rolex |
|---|---|
| Gender | Female |
| AgeGroup | Adult |
| Color | Black |
| Collection | Datejust |
| Model | Datejust 31 |
| Reference | 278240 |
| Case Material | Oystersteel |
| Case Diameter | 31 mm |
| Size | Small |
| Dial | Bright black |
| Dial Gems | Not gem-set |
| Bracelet | Oyster |
| Bracelet Material | Oystersteel |
| Clasp | Folding Oysterclasp with Easylink 5 mm comfort extension link |
| Bezel | Domed |
| Crystal | Scratch-resistant sapphire, Cyclops lens over the date |
| Winding Crown | Screw-down, Twinlock double waterproofness system |
| Water Resistance | Waterproof to 100 metres / 330 feet |
| Oyster Architecture | Monobloc middle case, screw-down case back and winding crown |
| Calibre | 2236, Manufacture Rolex |
| Movement | Perpetual, mechanical, self-winding |
| Functions | Centre hour, minute and seconds hands. Instantaneous date with rapid setting. Stop-seconds for precise time setting |
| Power Reserve | Approximately 55 hours |
| Precision | -2/+2 sec/day, after casing |
| Oscillator | Syloxi hairspring in silicon with patented geometry. High-performance Paraflex shock absorbers |
| Winding | Bidirectional self-winding via Perpetual rotor |
| Certification | Superlative Chronometer (official chronometer certification + Rolex certification after casing) |
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