The Rolex Datejust 31 reference 278344RBR-0020 is a luxury timepiece that combines technical precision with a jewelry-like aesthetic. It features a 31mm White Rolesor case, which is a signature Rolex combination of Oystersteel and 18k white gold. The watch is defined by its mint green dial, which undergoes a masterful sunray brushing technique to create delicate light reflections. This model is distinguished by its domed bezel set with diamonds in a scattered star pattern, adding a unique brilliance to the classic silhouette. It is paired with a five-piece link Jubilee bracelet in Oystersteel, equipped with a concealed folding Crownclasp for a seamless and comfortable fit on the wrist.
Powering the watch is the caliber 2236, a self-winding mechanical movement manufactured by Rolex. This high-performance movement features a Syloxi hairspring in silicon and Paraflex shock absorbers, providing a power reserve of approximately 55 hours and maintaining a superlative chronometer precision of -2/+2 seconds per day. The timepiece includes fundamental complications such as central hour, minute, and seconds hands, along with an instantaneous date display at the 3 o’clock position, magnified by the iconic Cyclops lens on the scratch-resistant sapphire crystal. With a Twinlock screw-down crown and Oyster architecture, the case ensures water resistance up to 100 meters.
General reviews of the Datejust 31 collection emphasize its versatility and growing popularity among collectors seeking a refined size between the classic Lady-Datejust and the larger 36mm models. The mint green dial is frequently praised for its modern yet earthy tone, which provides a sophisticated alternative to more traditional colors. Critics and enthusiasts alike appreciate the blend of robust stainless steel with the elegance of white gold and diamonds, though some note that the Jubilee bracelet and gem-set bezel lean toward a more formal appearance. The inclusion of the caliber 2236 is often highlighted as a significant technical achievement, offering the same level of reliability and accuracy found in Rolex’s larger professional models.