The Rolex Datejust 31 reference 278381RBR-0016 is a luxury midsize timepiece featuring a 31mm case crafted from Everose Rolesor, a signature combination of 904L Oystersteel and 18k Everose gold. The watch is distinguished by its silver sunray dial, which is adorned with ten diamonds set in 18k gold settings to ensure lasting luster. Its aesthetic is further enhanced by an 18k Everose gold bezel set with 46 brilliant-cut diamonds. The timepiece is paired with a five-piece link Jubilee bracelet, providing a supple and comfortable fit, and is secured with a concealed folding Crownclasp.
At the heart of the watch is the high-performance caliber 2236, a self-winding mechanical movement entirely developed and manufactured by Rolex. This movement incorporates the patented Syloxi hairspring in silicon, which offers exceptional resistance to magnetic fields and temperature variations, alongside Paraflex shock absorbers for increased durability. It provides a power reserve of approximately 55 hours and maintains a precision of -2/+2 seconds per day. The Oyster case architecture, featuring a screw-down winding crown with the Twinlock double waterproofness system, ensures the watch is water-resistant to 100 meters.
General reviews of the reference 278381RBR frequently praise its balanced proportions and the refined integration of precious materials and gemstones. Collectors often highlight the silver sunray dial for its ability to create delicate light reflections, making it versatile for both formal and daily wear. While the 31mm size is widely appreciated for offering a substantial wrist presence compared to smaller lady’s models, some enthusiasts note that the diamond-set bezel positions it firmly as a jewelry-oriented timepiece. The Jubilee bracelet is consistently lauded for its elegance and comfort, although the concealed clasp lacks the tool-free micro-adjustment features found on sportier Rolex bracelets.