Rolex Datejust 31 31 mm 278240BRO Steel Blue

The Rolex Datejust is arguably the most recognized watch in the world, and the 31 mm case size occupies a uniquely versatile position in the lineup — large enough to wear as a confident statement piece yet scaled to suit a wide range of wrists. Reference 278240BRO represents the current generation of the Datejust 31, offering all of the refinement and mechanical integrity that have made the Datejust a cultural touchstone since its debut in 1945 as the first self-winding wristwatch to display the date in a window on the dial.

The case of the 278240BRO is crafted entirely from Rolex's proprietary 904L Oystersteel, an alloy chosen for its exceptional resistance to corrosion and its ability to take and hold a high polish. At 31 mm in diameter the case wears with understated elegance, and the domed bezel — smooth and polished — keeps the silhouette clean and classic, allowing the dial to remain the focal point. The Oyster case construction, with its screw-down crown and solid case back, lends the watch meaningful resistance to the elements.

The bright blue dial of this reference is one of its most compelling features. Rolex renders it with depth and vibrancy, and the applied Roman numeral hour markers reinforce a sense of classical refinement. The combination of a vivid blue sunburst-style dial and crisp Roman numerals strikes a balance between sporty color and formal legibility that few watches at any price point can match. A date window at 3 o'clock, fitted with Rolex's signature Cyclops lens for magnification, completes the dial layout in faithful Datejust tradition.

Powering the 278240BRO is an automatic movement, delivering the smooth, reliable performance that professional watchmakers and enthusiastic collectors alike associate with the Rolex name. Rolex manufactures its movements entirely in-house, and each caliber undergoes stringent testing to meet the brand's Superlative Chronometer standard, ensuring accuracy and consistency well above standard COSC certification. The movement winds via a Perpetual rotor, so regular daily wear keeps the watch running without the need for manual winding.

The Oyster bracelet is one of the great icons of 20th-century industrial design — three-link, robustly constructed, and engineered to sit flush and comfortable on the wrist. On the 278240BRO it is finished in matching Oystersteel and secured with Rolex's folding Oysterclasp, combining security with ease of use. Whether worn against a tailored cuff or a casual sleeve, the bracelet elevates the watch's overall presence without overpowering it.

At Bizak & Co. we source pre-owned and unworn luxury timepieces with the discernment and attention to detail that our clients expect. The Rolex Datejust 31 reference 278240BRO in bright blue is a watch that rewards every glance — it is equally appropriate as a first serious Rolex, a meaningful gift, or a considered addition to a growing collection. We invite you to reach out to our team at bizakandco.com to learn more, ask questions, or begin the purchase process for this exceptional timepiece.