The Rolex Datejust 31 reference 278384RBR-0021 is a luxury timepiece that combines professional-grade engineering with high-end jewelry elements. It features a 31mm White Rolesor case, which integrates a durable Oystersteel monobloc middle case with an 18k white gold bezel set with brilliant-cut diamonds. The watch is defined by its mint green dial, which utilizes a sunray finish to create subtle light reflections that shift with the movement of the wearer’s wrist. The dial is protected by a scratch-resistant sapphire crystal with a Cyclops lens over the date aperture for enhanced legibility.
The timepiece is powered by the manufacture Rolex caliber 2236, a self-winding mechanical movement that is COSC-certified and features a Syloxi hairspring in silicon to provide high resistance to magnetic fields and temperature variations. This movement offers a power reserve of approximately 55 hours and maintains a precision of -2/+2 seconds per day after casing. Functional complications include central hour, minute, and seconds hands, along with an instantaneous date display and stop-seconds for precise time setting. The watch is equipped with a three-piece link Oyster bracelet in Oystersteel, featuring a folding Oysterclasp and the Easylink 5mm comfort extension system.
General reviews of the Datejust 31 collection emphasize its classic, timeless aesthetic and its suitability for both daily wear and formal occasions. The inclusion of the factory diamond-set bezel is often noted as a significant upgrade that enhances the watch’s jewelry-like appeal without sacrificing its robust nature. While the 31mm size is praised for its balanced proportions on smaller wrists, some critics note that the lack of double anti-reflective coating on the crystal can occasionally lead to glare. Overall, the model is highly regarded for its reliable movement, exceptional finishing, and the distinctive character of the mint green sunray dial.