Description
Make a date of a day
This Oyster Perpetual Datejust 31 in Oystersteel features a silver dial and a Jubilee bracelet.
Silver dial
A watchmaking technique
The sunray finish creates delicate light reflections on many dials in the Oyster Perpetual collection. It is obtained using masterful brushing techniques that create grooves running outwards from the centre of the dial. Light is diffused consistently along each engraving, creating a characteristic subtle glow that moves depending on the position of the wrist. Once the sunray finish has been completed, the dial colour is applied using Physical Vapour Deposition or electroplating. A light coat of varnish gives the dial its final look.
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 Jubilee bracelet
Supple and comfortable
The design, development and production of Rolex bracelets and clasps, as well as the stringent tests they face, involve advanced high technology. And, as with all the components of the watch, aesthetic controls by the human eye guarantee impeccable beauty. The Jubilee, a supple and comfortable five-piece link metal bracelet, was designed and made especially for the launch of the Oyster Perpetual Datejust in 1945.
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 | Grey |
| Collection | Datejust |
| Model | Datejust 31 |
| Reference | 278240 |
| Case Material | Oystersteel |
| Case Diameter | 31 mm |
| Size | Small |
| Dial | Silver |
| Dial Gems | Not gem-set |
| Bracelet | Jubilee |
| Bracelet Material | Oystersteel |
| Clasp | Concealed folding Crownclasp |
| 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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