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

About This Watch

The Rolex Datejust 31 reference 278343RBR-0031 stands apart for its harmonious blend of materials and its striking, deliberate aesthetic choices. The case, a fusion of stainless steel and yellow gold, reflects Rolex’s longstanding tradition of pairing robustness with refinement, while the dial’s deep olive green hue—reminiscent of a muted natural tone—offers a rare and subdued contrast to the watch’s metallic elements. The absence of traditional indexes and the use of slender, minimalist stick hands amplify the dial’s clean, almost architectural presence, drawing attention to the subtle floral motif etched into the bezel. This design, though restrained, carries the Datejust collection’s legacy of understated elegance, first introduced in 1945 as a symbol of timeless sophistication. At its core, the watch houses the Caliber 2236, an automatic movement renowned for its precision and reliability, featuring a Parachrom blue balance spring and a 70-hour power reserve. The domed sapphire crystal and the case’s 100-meter water resistance further underscore its balance of function and artistry. The 31mm diameter, a modern reinterpretation of the Datejust’s classic proportions, ensures a presence that is both intimate and commanding. This timepiece is suited for those who value discretion as much as craftsmanship—individuals who seek a watch that complements a refined lifestyle without overt statement. It thrives in the quiet moments of significance: a boardroom meeting, a gala, or a quiet evening with a book. Its presence is not about being seen, but about being recognized.

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-0031 is one of 24 executions of the 278343RBR base reference. Underneath they are the same watch; what separates this one is a green 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-0015 · 31 mm

Rolex

Green · Yellow Gold, Stainless Steel

278343RBR-0016 · 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