The Rolex Datejust 31 reference 278289RBR-0005 is a mid-size luxury timepiece that combines an 18kt white gold construction with high-jewelry elements. The watch features a 31mm Oyster case with a monobloc middle case, a screw-down case back, and a Twinlock winding crown, ensuring water resistance up to 100 meters. A significant design highlight is the white mother-of-pearl dial, which is naturally unique and set with 10 diamonds in 18kt gold settings. The aesthetic is further elevated by a diamond-set bezel and the iconic President bracelet, characterized by its semi-circular three-piece links and a concealed folding Crownclasp.
Internally, the watch is powered by the caliber 2236, a self-winding mechanical movement manufactured by Rolex. This movement incorporates the patented Syloxi hairspring in silicon and Paraflex shock absorbers, providing high resistance to magnetic fields, temperature variations, and shocks. It offers a power reserve of approximately 55 hours and carries the Superlative Chronometer certification, guaranteeing a precision of -2/+2 seconds per day. The complications include center hour, minute, and seconds hands, along with an instantaneous date display at the 3 o’clock position, visible through a scratch-resistant sapphire crystal with a Cyclops magnifying lens.
General reviews of the Datejust 31 series emphasize its versatility and refined proportions, positioning it as an ideal choice for those seeking a modern yet classic feminine watch. The 31mm size is frequently praised for offering more presence than the 28mm Lady-Datejust while remaining more delicate than the 36mm models. Users often highlight the exceptional comfort and “regal” appearance of the President bracelet, though some note that all-gold models with gem-set features represent a significant price investment. The movement is highly regarded for its reliability and precision, particularly for achieving high performance within the constraints of a smaller case diameter.