The Rolex Datejust 31 reference 278344RBR-0008 is a 31mm luxury timepiece that combines the durability of Oystersteel with the elegance of 18k white gold, a pairing known as White Rolesor. This model features a dark grey sunray dial adorned with ten diamonds set in 18k gold settings. A standout design element is the fixed white gold domed bezel, which is set with 24 diamonds in a scattered star pattern. The watch is presented on a five-piece link Jubilee bracelet equipped with a concealed folding Crownclasp, maintaining a seamless aesthetic around the wrist.
Inside the case is the caliber 2236, a self-winding mechanical movement manufactured by Rolex that offers a power reserve of approximately 55 hours. The movement features a Syloxi hairspring in silicon and high-performance Paraflex shock absorbers to ensure stability and precision of -2/+2 seconds per day. The watch includes a central hour, minute, and seconds hands with an instantaneous date display at the 3 o’clock position, viewed through a Cyclops magnification lens on the scratch-resistant sapphire crystal. The Twinlock screw-down crown and solid case back contribute to a water resistance rating of 100 meters.
General reviews of the Datejust 31 series emphasize its versatility as both a daily wearer and a formal accessory, noting that the 31mm size provides a balanced presence for those seeking a mid-size profile. The specific 278344RBR-0008 iteration is frequently praised for the unique “star” diamond bezel, which offers a more modern and playful take on traditional diamond settings compared to a full-set bezel. While the aesthetic is highly regarded for its refined sparkle, some owners suggest that the concealed Crownclasp on the Jubilee bracelet, while visually elegant, lacks the micro-adjustment features found on Oysterlock clasps. Overall, it is considered a reliable and timeless example of Rolex’s classic watchmaking.