The Rolex Datejust 31 reference 278343RBR-0019 is a luxury mid-size timepiece that blends the durability of Oystersteel with the elegance of 18k yellow gold, a signature Rolex combination known as Yellow Rolesor. This model features a 31mm Oyster case equipped with a screw-down case back and a Twinlock double waterproofness system, ensuring water resistance up to 100 meters. The aesthetic is defined by its silver sunray dial, which is adorned with ten diamonds set in 18k gold settings, and a domed yellow gold bezel pavé-set with 24 diamonds. It is paired with a three-piece link Oyster bracelet that includes a folding Oysterclasp and the Easylink 5mm comfort extension link for easy adjustments.
At its core, the watch is powered by the caliber 2236, a self-winding mechanical movement manufactured by Rolex. This COSC-certified Superlative Chronometer offers a precision of -2/+2 seconds per day and a power reserve of approximately 55 hours. The movement incorporates a Syloxi hairspring in silicon for magnetic resistance and Paraflex shock absorbers for increased durability. Its functional complications include center hour, minute, and seconds hands, along with an instantaneous date display at the 3 o’clock position, which is magnified by a Cyclops lens on the scratch-resistant sapphire crystal.
General reviews of the Datejust 31 often praise its balanced proportions and its status as a versatile “everyday” luxury watch that transitions easily between casual and formal settings. The “scattered” diamond bezel is frequently highlighted for offering a playful yet refined alternative to traditional full-diamond bezels, providing a significant amount of brilliance without being overwhelming. While owners appreciate the mechanical reliability and the comfort of the Oyster bracelet, some feedback notes that the 31mm size is a specific preference for those seeking a modern feminine fit that offers more presence than the smaller Lady-Datejust models but remains more compact than the 36mm versions.