The Rolex Datejust 31 reference 278383RBR-0016 is a luxury timepiece characterized by its 31mm Oyster case, which is crafted from Yellow Rolesor, a signature Rolex combination of Oystersteel and 18k yellow gold. This model features an olive green sunray dial adorned with 18k yellow gold Roman numeral hour markers, including a prominent diamond-set VI. The aesthetic is further elevated by a fixed 18k yellow gold bezel set with 46 brilliant-cut diamonds and a matching two-tone Jubilee bracelet equipped with a concealed folding Crownclasp.
Technically, the watch is powered by the manufacture caliber 2236, a self-winding mechanical movement that incorporates a Syloxi hairspring and Paraflex shock absorbers to enhance stability and precision. It offers an approximate 55-hour power reserve and is a certified Superlative Chronometer, maintaining an accuracy of -2/+2 seconds per day. Functional complications include central hour, minute, and seconds hands, alongside an instantaneous date window at the 3 o’clock position, which is magnified by a Cyclops lens. The watch is engineered for durability with a scratch-resistant sapphire crystal and a Twinlock double waterproofness system, providing water resistance up to 100 meters.
General reviews of the Datejust 31 often emphasize its balanced proportions and versatile design, noting that the 31mm size provides a substantial yet elegant presence on the wrist. Critics and enthusiasts frequently praise the olive green dial for its unique hue and the quality of the gem-setting, which adds a sophisticated sparkle without compromising the watch’s classic silhouette. While it is highly regarded for its robust construction and chronometric reliability, some collectors note that the mid-size category and specific gem-set configurations occupy a niche market compared to the larger 36mm or 41mm variants.