The Rolex Datejust 31 reference 278384RBR-0019 is a luxury timepiece that features a 31mm White Rolesor case, which is a signature Rolex combination of Oystersteel and 18k white gold. This model is distinguished by its dark grey rhodium dial with a sunray finish, accented by white gold index hour markers and a scratch-resistant sapphire crystal with a Cyclops lens for date magnification. The aesthetic is further elevated by a fixed bezel set with brilliant-cut diamonds and an Oyster bracelet made of three-piece solid links in Oystersteel, equipped with a folding Oysterclasp and a 5mm Easylink comfort extension.
Under the dial, the watch is powered by the caliber 2236, a self-winding mechanical movement manufactured entirely by Rolex. This movement incorporates the patented Syloxi hairspring in silicon, which provides high resistance to magnetic fields and temperature variations, ensuring precision within -2/+2 seconds per day. The watch offers approximately 55 hours of power reserve and includes complications such as a central instantaneous date with rapid setting and stop-seconds for precise time adjustment. Its Oyster case, featuring a screw-down crown with the Twinlock double waterproofness system, ensures a water resistance of up to 100 meters.
General reviews of the Datejust 31 highlight its versatility as a mid-sized watch that bridges the gap between classic feminine proportions and contemporary presence. Collectors frequently praise the durability of the Oystersteel construction and the reliability of the caliber 2236 movement, which is COSC-certified. While the diamond-set bezel is often cited as a standout feature for those seeking a touch of elegance, some critics note that the 31mm size may be less appealing to those who prefer the larger profile of the 36mm or 41mm Datejust models. Overall, it is regarded as a sophisticated and robust choice for a high-end daily wearer.