Rolex Datejust 31 31 mm 278240WRO Steel White

The Rolex Datejust is widely regarded as the archetype of the classic dress watch, and the Datejust 31 carries that legacy forward in a versatile 31 mm case that suits a broad range of wrists. Introduced as the natural evolution of the original 1945 Datejust—the first self-winding wristwatch to display the date in a window at 3 o'clock—the line has remained a cornerstone of Rolex's catalog for decades. Reference 278240WRO slots into the current generation of the Datejust 31, inheriting the full breadth of Rolex engineering refinement that has accumulated over that long history.

The case of the 278240WRO is crafted entirely from Rolex's proprietary 904L stainless steel, an alloy chosen for its exceptional corrosion resistance and brilliant polished finish. At 31 mm in diameter the case occupies a considered middle ground—larger than a delicate ladies' watch yet compact enough to slide beneath a shirt cuff with ease. The domed bezel, rendered in the same stainless steel as the case, keeps the design vocabulary pure and unadorned, allowing the dial to remain the undisputed focal point.

That dial is finished in white and dressed with Roman numerals, a combination that speaks directly to classical watchmaking tradition. Roman numerals lend a sense of ceremony and formality that Arabic indices simply cannot replicate, and against a clean white backdrop they create a high-contrast, instantly legible display. The date aperture at 3 o'clock is magnified by Rolex's signature Cyclops lens, making the date as effortless to read as the hour.

The watch is worn on Rolex's Oyster bracelet, a three-link design that has been refined over generations into one of the most comfortable and durable metal bracelets in watchmaking. Its combination of polished center links and brushed outer links echoes the finishing of the case, creating a coherent and harmonious silhouette from lug to lug. The Oysterlock safety clasp ensures the bracelet stays secure throughout even the most active day.

An automatic movement beats at the heart of the 278240WRO, delivering the self-winding convenience that modern wearers expect from a luxury watch worn daily. Rolex automatic movements are manufactured in-house to chronometer-standard precision, certified by the COSC, and are recognized throughout the industry for long-term robustness and ease of servicing. Whether this example is destined for daily rotation or a carefully curated collection, it will keep exceptional time.

Bizak & Co. is a trusted source for pre-owned and secondary-market luxury timepieces, and the Rolex Datejust 31 ref. 278240WRO represents one of the most enduringly desirable references in the Datejust family. Its white Roman dial and domed bezel configuration is a perennial favorite among buyers who prize classical aesthetics over trend-driven design. Browse the listing at bizakandco.com, reach out to our team with any questions, and own this iconic Rolex Datejust 31 with confidence.