| Brand |
Rolex |
| Model |
Datejust 31 |
| Reference Number |
278240-0017 |
| Case Type |
Oyster, 31 mm, Oystersteel |
| Case Diameter |
31 mm |
| Case Material |
Oystersteel
|
| Bezel |
Domed |
| Oyster Architecture |
Monobloc middle case, screw-down case back and winding crown |
| 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 |
| Movement Type |
Perpetual, mechanical, self-winding |
| Calibre |
2236, Manufacture Rolex |
| 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 |
| Power reserve |
Approximately 55 hours |
| Functions |
Centre hour, minute and seconds hands. Instantaneous date with rapid setting. Stop-seconds for precise time setting |
| Bracelet Type |
Oyster, three-piece solid links |
| Bracelet Material |
Oystersteel |
| Clasp |
Folding Oysterclasp with Easylink 5 mm comfort extension link |
| Dial Color |
Bright Blue |
| Dial Details |
Roman Numerals |
| Country/Region of Manufacture |
Switzerland |
| Warranty |
Rolex Warranty Card |
