Rolex Datejust 31
Oyster, 31 mm, Oystersteel, white gold and diamonds
M278344RBR-0021
| Reference | 278344RBR |
| Material | White Rolesor - combination of Oystersteel and white gold |
| Diameter | 31 mm |
| Movement | Perpetual, mechanical, self-winding |
| Dial | Pink |
| Power Reserve | Approximately 55 hours |
| Model Case | Oyster, 31 mm, Oystersteel, white gold and diamonds |
| Bezel | Domed, set with diamonds |
| 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 |
| Calibre | 2236, Manufacture Rolex |
| Bracelet | Oyster, three-piece solid links |
| Bracelet Material | Oystersteel |
| Clasp | Folding Oysterclasp with Easylink 5 mm comfort extension link |
| Certification | Superlative Chronometer (COSC + Rolex certification after casing) |
Pink Dial
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.
Diamond-set bezel
Gem-setters, like sculptors, finely carve the precious metal to hand-shape the seat in which each gemstone will be perfectly lodged. With the art and craft of a jeweller, the stone is placed and meticulously aligned with the others, then firmly secured in its gold or platinum setting. Besides the intrinsic quality of the stones, several other criteria contribute to the beauty of Rolex gem-setting: the precise alignment of the height of the gems, their orientation and position, the regularity, strength and proportions of the setting as well as the intricate finishing of the metalwork. A sparkling symphony to enhance the watch and enchant the wearer.
White Rolesor
Gold is coveted for its lustre and nobility. Steel reinforces strength and reliability. Together, they harmoniously combine the best of their properties. A true Rolex signature, Rolesor has featured on Rolex models since the early 1930s, and was trademarked as a name in 1933. It is one of the prominent pillars of the Oyster collection.Model Availability
