The Rolex Datejust 31 reference 278344RBR-0024 is a luxury timepiece characterized by its 31mm White Rolesor case, which combines the durability of Oystersteel with a polished 18k white gold domed bezel. This specific model is distinguished by its dark grey or rhodium dial featuring a sunray finish and applied Roman numeral hour markers. A notable design element is the scattered diamond-set bezel, often referred to as a “star” diamond bezel, which adds a decorative touch to the classic silhouette. The watch is presented on a five-piece link Jubilee bracelet crafted from Oystersteel, known for its flexibility and comfort, and is secured by a concealed folding Crownclasp.
Mechanically, the timepiece is powered by the in-house caliber 2236, a self-winding perpetual movement that offers a power reserve of approximately 55 hours. The movement includes a Syloxi hairspring in silicon and high-performance Paraflex shock absorbers to ensure stability and resistance to temperature variations and shocks. Its primary complications include center hours, minutes, and seconds, along with an instantaneous date window at the 3 o’clock position magnified by a Cyclops lens. The watch is a Superlative Chronometer, certified to maintain a precision of -2/+2 seconds per day after casing, and features a Twinlock double waterproofness system ensuring water resistance up to 100 meters.
General reviews of this Datejust 31 iteration emphasize its versatility and elegant proportions, making it a popular choice for those seeking a mid-size luxury watch that transitions well from casual to formal settings. Enthusiasts frequently praise the visual depth of the rhodium dial and the unique aesthetic provided by the scattered diamond bezel, which offers a more contemporary look compared to traditional fully-set diamond bezels. While the watch is highly regarded for its robust construction and iconic design, some collectors note that the 31mm size may feel small for those accustomed to larger modern sports watches, though it remains a staple in Rolex’s catalog for its timeless appeal and reliable mechanical performance.