Datejust 31 Stainless Steel / Yellow Gold / Domed - Diamond / Olive - Roman / Oyster

About This Watch

The Rolex Datejust 31, in its 278343RBR-0015 iteration, marries the enduring elegance of the Datejust collection with a striking reinterpretation of classic design. Introduced in 1945 as a symbol of precision and sophistication, the Datejust has long epitomized the intersection of horology and luxury. This particular model distinguishes itself through a harmonious blend of yellow gold and stainless steel, a construction that balances the warmth of precious metal with the resilience of Oystersteel. At its heart lies a dial of deep, rich green, finished with a sunburst pattern that catches light with subtle dynamism. The Roman numerals, paired with slender stick hands, evoke a sense of timeless restraint, while a diamond-set bezel adds a quiet note of opulence. The case, measuring 31mm in diameter, is proportioned for modern wear, its rounded edges and polished surfaces reflecting the meticulous attention to detail that defines Rolex’s Oyster case. Powering this watch is the Caliber 2236, an automatic movement featuring a Parachrom balance spring and a Chronergy escapement, ensuring exceptional accuracy and longevity. The sapphire crystal, paired with a closed case back, underscores the watch’s commitment to durability and refinement. The green dial, though unconventional, resonates with the Datejust’s heritage of bold yet understated innovation. This timepiece is suited for those who seek a companion to moments of significance—whether in the boardroom, at a gala, or during a personal milestone. It speaks to a wearer who values heritage, craftsmanship, and the quiet confidence of a design that transcends trends.

In Context

At 31 mm it is small by current standards, in the range most wristwatches occupied before cases began growing through the 1990s. The case back is closed, so the movement stays out of sight, and the sapphire crystal will resist everything short of deliberate abuse. 100 m is genuine swimming resistance — more than the shape of this watch suggests it would need.

The movement winds itself from the motion of your wrist. 55 hours of reserve is enough to set it down on Friday evening and find it still running on Monday. At 28,800 vph the seconds hand advances 8 times a second.

278343RBR-0015 is one of 24 executions of the 278343RBR base reference. Underneath they are the same watch; what separates this one is a green sunburst dial and a yellow gold, stainless steel case.

Rolex

White · Yellow Gold, Stainless Steel

278343RBR-0001 · 31 mm

Rolex

White · Yellow Gold, Stainless Steel

278343RBR-0002 · 31 mm

Rolex

Silver · Yellow Gold, Stainless Steel

278343RBR-0003 · 31 mm

Rolex

Silver · Yellow Gold, Stainless Steel

278343RBR-0004 · 31 mm

Rolex

Champagne · Yellow Gold, Stainless Steel

278343RBR-0013 · 31 mm

Rolex

Champagne · Yellow Gold, Stainless Steel

278343RBR-0014 · 31 mm

Rolex

Green · Yellow Gold, Stainless Steel

278343RBR-0016 · 31 mm

Rolex

Grey · Yellow Gold, Stainless Steel

278343RBR-0017 · 31 mm

+ 15 more variants in this family.

The 2236 is the Rolex movement inside more watches in this library than any other: 907, in the 28 mm Lady-Datejust and the 31 mm Datejust 31. It was the first Rolex caliber with a silicon hairspring. Introduced in 2014 in the Pearlmaster 34, it is a 20 mm automatic with a date, 31 jewels, a 55-hour reserve and a beat of 28,800 vph, certified by the COSC and then tested again by Rolex after casing to the Superlative Chronometer tolerance of two seconds a day. Its distinction is the Syloxi hairspring: silicon, immune to magnetism, etched to a patented geometry that keeps the spring concentric in every position, and paired with Paraflex shock absorbers. The larger Rolex calibers kept the Parachrom alloy spring; Syloxi did not reach a men's movement until the 7140 of 2023. The [2236 piece](/blog/the-rolex-2236-the-most-common-movement-in-this-library) sets out that history. In the library it powers 488 [Datejust 31](/brands/rolex/datejust-31) references, the seven-digit 2782xx generation of 2020, 399 [Lady-Datejusts](/brands/rolex/lady-datejust) of the 2791xx generation of 2015, 15 [Pearlmasters](/brands/rolex/pearlmaster) and 5 [Yacht-Master 37s](/brands/rolex/yacht-master). The [2235](/calibers/rolex-2235) is the 48-hour movement it replaced, the [2232](/calibers/rolex-2232) its no-date sibling for the Oyster Perpetual, and the [3235](/calibers/rolex-3235) its counterpart in the 36 mm and 41 mm cases.

906 other watches in the library run the Rolex 2236.

Rolex

Lady-Datejust 28 Rolesor Everose Diamond / Oyster / MOP

279381RBR-0014 · 28 mm

Rolex

Lady-Datejust 28 Rolesor Rose Diamond / Jubilee / MOP

279381rbr-0013 · 28 mm

Rolex

Lady-Datejust 28 Rolesor Yellow Domed / Oyster / MOP

279163-0014 · 28 mm

Rolex

Datejust 31 Stainless Steel / Yellow Gold / Diamond / Black MOP / Oyster

278383RBR-0023 · 31 mm