The Rolex Datejust 31 reference 278383RBR-0002 is an elegant mid-size luxury timepiece featuring a 31mm Oyster case crafted from Yellow Rolesor, a signature Rolex combination of Oystersteel and 18k yellow gold. This model is distinguished by a fixed 18k yellow gold bezel meticulously set with 46 diamonds and a clean white dial adorned with 18k yellow gold Roman numeral hour markers. The watch is presented on a five-piece link Jubilee bracelet, which includes a concealed folding Crownclasp for a seamless aesthetic. It is powered by the in-house caliber 2236, a self-winding mechanical movement that provides a power reserve of approximately 55 hours and features a Syloxi hairspring in silicon for enhanced resistance to magnetic fields and temperature variations.
In terms of functionality and complications, the timepiece offers central hour, minute, and seconds hands, alongside an instantaneous date display located at the 3 o’clock position. The date is magnified by the iconic Cyclops lens integrated into the scratch-resistant sapphire crystal. For precision, the movement includes a stop-seconds function for accurate time setting. The case utilizes a screw-down winding crown with a Twinlock double waterproofness system, ensuring water resistance up to 100 meters. As a Superlative Chronometer, the watch has undergone rigorous testing to ensure a precision of -2/+2 seconds per day after casing.
General reviews of the Datejust 31 emphasize its refined proportions and versatility as both a dress and everyday watch. The Yellow Rolesor construction is frequently praised for balancing the durability of steel with the prestige of gold, while the diamond-set bezel is noted for providing a sophisticated brilliance without being overly ostentatious. Owners often highlight the comfort of the Jubilee bracelet and the reliability of the modern caliber 2236 movement. While the 31mm size is widely considered an ideal feminine classic, some collectors suggest that those preferring a more contemporary, larger presence on the wrist might look toward the 36mm alternatives.