Rolex Datejust 31, 18k Yellow Gold. White dial with hour markers is a Roman Numerals. The 18k Yellow Gold Fluted Bezel. The Watch comes with Mechanical Self-winding Movement & 2236 Caliber w/ 31 jewels & 55 hours power reserve. The Oyster 18k Yellow Gold bracelet with concealed folding Crownclasp. The Waterproof is to 100m/330 feet. The Watch is with Rolex Watch box, Rolex Warranty Card. Covered with Rolex Warranty.
| SPECIFICATIONS: | |
| Make | Rolex |
| Model | Datejust 31 |
| Reference | 278278-0019 |
| MODEL CASE | |
| Model case | Oyster, 31 mm, yellow gold |
| Oyster architecture | Monobloc middle case, screw-down case back and winding crown |
| Diameter | 31 mm |
| Material | 18 ct Yellow gold |
| Bezel | Fluted |
| Winding crown | Screw-down, Twinlock double waterproofness system |
| Crystal | Scratch-resistant sapphire, Cyclops lens over the date |
| Water-resistance | Waterproof to 100 meters / 330 feet |
| MOVEMENT | |
| Movement | Perpetual, mechanical, self-winding |
| Caliber | 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 |
| BRACELET | |
| Bracelet | Oyster, flat three-piece links |
| Bracelet material | 18 ct yellow gold |
| Clasp | Concealed folding Crownclasp |
| DIAL | |
| Dial | White |
| CERTIFICATION | |
| Superlative Chronometer (COSC Rolex certification after casing) | |
| WHAT IS INCLUDED | |
| Box | Original Rolex Watch box |
| Booklets | Yes |
| Warranty | Rolex Warranty card |