Rolex Datejust 31 31 mm 278240GNSJ Steel Green

The Rolex Datejust is one of the most enduring and recognizable watch designs in horological history, having been introduced in 1945 as the first self-winding wristwatch to display the date automatically through a window in the dial. Over the eight decades since its debut, the Datejust has evolved through numerous case sizes, dial variations, and material combinations while retaining the essential DNA — the cyclops date lens, the fluted or domed bezel, and the instantly legible dial — that made it an icon. The 31mm mid-size configuration occupies a sweet spot in the Datejust family, offering a refined, versatile proportion that works equally well as a dedicated ladies' watch or as a smaller dress piece for any collector.

Reference 278240GNSJ is built on a 31mm oyster case crafted entirely from Oystersteel, Rolex's proprietary 904L stainless steel alloy, which is renowned for its exceptional corrosion resistance and its ability to take and hold a deep, lustrous polish far beyond what standard 316L steel can achieve. The smooth domed bezel is a classic choice that frames the dial with understated elegance, contrasting with the busier visual energy of fluted or gem-set alternatives and ensuring that all attention is drawn inward to the watch's most captivating feature: its mint green dial.

That mint green dial is the defining characteristic of this particular reference. The soft, cool tone sits in a modern color family that has captured intense collector interest across Rolex's current lineup, evoking freshness and sophistication in equal measure. Clean applied index hour markers in polished steel catch the light crisply against the green ground, and the overall effect is simultaneously contemporary and timeless — a pairing that is far harder to achieve than it appears. The dial is protected by a scratch-resistant sapphire crystal, and the date window at three o'clock is magnified by the signature Cyclops lens for effortless legibility.

The watch is presented on Rolex's iconic five-link Jubilee bracelet, a design that dates to 1945 and was created specifically for the Datejust at its launch. The Jubilee's narrower center links and dressed-up aesthetic make it the natural companion for the Datejust's character, draping comfortably across the wrist and lending the piece a sense of occasion whether worn to the boardroom or to a weekend lunch. The Oysterclasp with Easylink comfort extension system ensures a secure, adjustable fit. Water resistance is rated to 100 metres (330 feet), underscoring that this is a serious, capable Rolex timepiece beneath its refined exterior.

At the heart of ref. 278240GNSJ beats a Rolex automatic movement, delivering the reliable, set-and-forget performance that has made the Datejust a lifelong companion for generations of wearers. Rolex movements are manufactured and certified entirely in-house, with finishing standards that exceed the demands of the Swiss Official Chronometer Testing Institute (COSC), and they are designed for decades of dependable service with routine care.

Bizak & Co. is a trusted source for pre-owned and current luxury timepieces, and the Rolex Datejust 31 in mint green is among the most requested references we handle. Whether you are adding a versatile everyday Rolex to your collection or seeking a first fine watch that will appreciate in both sentiment and value, ref. 278240GNSJ represents an outstanding choice. Reach out to our team at bizakandco.com to confirm availability, request detailed photographs, or purchase this watch online — we are here to make your acquisition seamless and confident.