The Rolex Datejust 31 reference 278383RBR-0019 is an elegant mid-size luxury watch featuring a 31mm case crafted from Yellow Rolesor, a signature Rolex combination of Oystersteel and 18k yellow gold. This model is distinguished by its sunray silver dial adorned with ten diamonds set in 18k gold settings and a bezel meticulously set with 46 brilliant-cut diamonds. The watch is presented on a three-piece link Oyster bracelet, which includes a folding Oysterclasp and the Easylink 5mm comfort extension link for easy adjustments. It is powered by the in-house caliber 2236, a self-winding mechanical movement that incorporates a Syloxi hairspring in silicon and Paraflex shock absorbers, providing a power reserve of approximately 55 hours and a superlative chronometer precision of -2/+2 seconds per day.
In terms of complications and functional features, the timepiece is equipped with center hour, minute, and seconds hands, along with an instantaneous date display visible through a Cyclops magnification lens at the 3 o’clock position. The Oyster case construction, featuring a monobloc middle case, screw-down case back, and a Twinlock double waterproofness system for the winding crown, ensures a water resistance of 100 meters. The inclusion of a stop-seconds function allows for precise time setting.
General reviews for this reference often highlight its successful blend of jewelry-like aesthetics with the robust engineering typical of the Datejust collection. The 31mm size is frequently praised as a versatile choice for those seeking a modern yet feminine profile that offers more presence than traditional 26mm or 28mm Lady-Datejust models. While the diamond-set bezel and dial markers position it as a more formal dress watch, its Oystersteel components and Oyster bracelet maintain the durability needed for daily wear. Some enthusiasts note that while the Oyster bracelet provides a sportier look, the lack of an anti-reflective coating on the sapphire crystal can occasionally lead to glare under direct lighting.