Rolex Datejust 31 31 mm 278240GRJ Steel Dark Grey

The Rolex Datejust is widely regarded as the watch that defined the modern dress timepiece, and the 31 mm variant occupies a special place within that legacy. Introduced as a mid-size option that sits between the ladies' 28 mm and the full-size 36 mm, the Datejust 31 offers balanced, versatile proportions that suit a broad spectrum of wearers. Reference 278240GRJ represents the current generation of this storied line, carrying forward decades of refinement in materials, finishing, and movement engineering.

The 31 mm Oyster case is crafted from Rolex's proprietary 904L Oystersteel, an alloy prized for its exceptional resistance to corrosion and its ability to hold a high-polish finish over years of daily wear. The stainless steel domed bezel frames the dial with clean, understated elegance, eschewing diamonds or fluting in favor of a smooth profile that keeps the focus on the dial itself. Every surface of the case is finished to Rolex's exacting standards, alternating between brushed flanks and polished edges.

The dark grey Roman dial is the defining character of reference 278240GRJ. Roman numerals rendered in a matching or contrasting tone give the dial a classical legibility that feels simultaneously vintage-inspired and thoroughly modern. The signature Datejust date window sits at three o'clock, framed by a cyclops lens on the sapphire crystal that magnifies the date 2.5×, making it one of the most instantly readable complications in watchmaking. The overall color story—cool grey against polished steel—lends the watch a versatile, gender-neutral sophistication.

The five-link Jubilee bracelet, one of Rolex's most celebrated designs, was developed alongside the original Datejust in the mid-twentieth century and remains the quintessential pairing for the model. Its closely articulated links conform naturally to the wrist, providing a fluid, comfortable drape that distinguishes it from more rigid bracelet constructions. Secured by Rolex's Crownclasp, it offers both security and ease of use in daily wear.

An automatic movement powers the watch, delivering self-winding convenience for anyone who wears it regularly. Rolex calibers fitted to the current Datejust 31 generation are manufactured entirely in-house and are certified as chronometers, meaning they meet the rigorous accuracy standards set by the Swiss Official Chronometer Testing Institute (COSC) before receiving Rolex's additional in-house certification. The result is a watch you can rely on for precision day after day.

Bizak & Co. specializes in pre-owned and unworn luxury timepieces, and reference 278240GRJ in the Datejust 31 is a perennial best-seller for good reason—it pairs immediate brand recognition with a dial treatment distinctive enough to stand apart from more common configurations. Whether you are buying your first Rolex or adding a versatile mid-size piece to an established collection, this reference represents exceptional value and enduring style. Reach out to Bizak & Co. through bizakandco.com to inquire, request additional photos, or purchase this Rolex Datejust 31 278240GRJ online with confidence.