The Rolex Datejust 31 reference 278384RBR-0031 is a luxury mid-size timepiece that blends Oystersteel with 18k white gold in a combination known as White Rolesor. This model features a 31mm Oyster case equipped with a diamond-set bezel, housing a dark grey or rhodium-colored sunray dial. The dial is characterized by Roman numeral hour markers and a large, diamond-set Roman VI, which adds a sophisticated aesthetic. It is fitted with an Oyster bracelet, a three-piece solid link design known for its robustness, featuring a folding Oysterclasp and the Easylink 5mm comfort extension link for easy adjustments.
The watch is powered by the in-house Caliber 2236, a self-winding mechanical movement that provides a power reserve of approximately 55 hours. This movement incorporates a silicon Syloxi hairspring and Paraflex shock absorbers to enhance resistance to temperature fluctuations, magnetic fields, and shocks. It is a Superlative Chronometer, certified to maintain a precision of -2/+2 seconds per day. Functional complications include central hands for hours, minutes, and seconds, alongside an instantaneous date display at the 3 o’clock position, which is magnified by the iconic Cyclops lens on the scratch-resistant sapphire crystal.
General reviews of the Datejust 31 highlight its versatility and balanced proportions, making it a popular choice for those seeking a timepiece that transitions easily between daily wear and formal occasions. Its 100-meter water resistance and durable construction are frequently praised as practical assets for a luxury watch. While the diamond-set elements and precious metal bezel are noted for their elegance, some collectors observe that the mid-size 31mm diameter offers a more contemporary presence compared to the traditional 26mm lady models, though the high demand and premium price point associated with diamond-set Rolex models remain a point of discussion.