Rolex Datejust 278240-0017 31mm Blue Roman Domed Bezel Oyster Bracelet Oystersteel Watch
Technical Specs:
Brand: | Rolex |
Model: | Datejust 31 |
Reference Number: | 278240-0017 |
CASE | |
Case Shape | Round |
Case Dimensions | 31 mm |
Oyster Architecture | Monobloc middle case, screw-down case back and winding crown |
Crystal | Scratch-resistant sapphire, Cyclops lens over the date |
Bezel | Domed |
Winding Crown | Screw-down, Twinlock double waterproofness system |
Water Resistance | Waterproof to 100 metres / 330 feet |
Case Material | Oystersteel |
DIAL | |
Dial Color | Blue |
Details | Roman Numerals |
BRACELET | |
Band Material | Oystersteel |
Band Name | Oyster, three-piece solid links |
Clasp | Folding Oysterclasp with Easylink 5 mm comfort extension link |
MOVEMENT | |
Movement Type | Perpetual, mechanical, self-winding |
Calibre | 2236, Manufacture Rolex |
Precision | -2/+2 sec/day, after casing |
Functions | Centre hour, minute and seconds hands. Instantaneous date with rapid setting. Stop-seconds for precise time setting |
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 |
COSC Certified | Superlative Chronometer (COSC + Rolex certification after casing) |
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