The Rolex Datejust 31 reference 278344RBR-0019 is a luxury timepiece that features a 31mm White Rolesor case, which combines the durability of Oystersteel with an 18kt white gold bezel. This specific model is distinguished by its mint green sunray dial adorned with polished index hour markers and a date window at the 3 o’clock position magnified by a Cyclops lens. The fixed white gold bezel is set with diamonds in a scattered star-like pattern, adding a refined aesthetic to the classic design. It is paired with a three-piece link Oyster bracelet made of Oystersteel, featuring a folding Oysterlock safety clasp and the 5mm Easylink comfort extension for easy adjustments.
Internally, the watch is powered by the in-house caliber 2236, a perpetual mechanical self-winding movement that is COSC-certified for high precision. This movement incorporates a Syloxi hairspring in silicon and high-performance Paraflex shock absorbers, providing a power reserve of approximately 55 hours. The timepiece offers fundamental complications including center hour, minute, and seconds hands, along with an instantaneous date with rapid setting and stop-seconds for precise time adjustment. Its architecture includes a monobloc middle case, a screw-down case back, and a Twinlock winding crown, ensuring water resistance up to 100 meters.
General reviews of this Datejust 31 model highlight its versatility and the striking appeal of the mint green dial, which is often praised for its unique and modern hue. The 31mm case size is frequently noted as an ideal mid-size option that balances presence and elegance on the wrist. Collectors and owners appreciate the blend of tool-watch robustness with the luxury of the diamond-set bezel, though some critics note that the scattered diamond pattern is a more niche aesthetic choice compared to a traditional full-set bezel. Overall, it is regarded as a reliable and prestigious daily wearer that maintains the legendary heritage of the Datejust collection.