Datejust 31 Stainless Steel / Yellow Gold / Domed / Grey - Roman / Oyster

About This Watch

The Rolex Datejust 31 reference 278243-0017 embodies the quiet authority of a design that has defined horological elegance for generations. A harmonious blend of stainless steel and yellow gold, its case exudes a balanced sophistication, a nod to the Datejust collection’s enduring legacy since its introduction in 1945. The grey sunburst dial, with its subtle depth and refinement, is framed by sleek Roman numerals and stick hands, a composition that merges classicism with modern restraint. The domed sapphire crystal adds a layer of contemporary precision, while the closed caseback ensures the watch remains a discreet yet commanding presence on the wrist. At its core, the 2236 automatic movement delivers the reliability and craftsmanship for which Rolex is renowned, with a power reserve of approximately 55 hours and a certified chronometer rating that underscores its engineering excellence. The 31mm case diameter, paired with a 16mm lug width, offers a refined fit that respects tradition without compromising wearability. This watch is for those who value understated distinction—a piece as suited to a quiet evening at a gallery opening as it is to the quiet confidence of daily life. It is not a statement, but a testament: to heritage, to precision, and to the enduring appeal of a design that has, for decades, set the standard for luxury timepieces.

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.

278243-0017 is one of 24 executions of the 278243 base reference. Underneath they are the same watch; what separates this one is a grey sunburst dial and a yellow gold, stainless steel case.

Rolex

White · Yellow Gold, Stainless Steel

278243-0001 · 31 mm

Rolex

White · Yellow Gold, Stainless Steel

278243-0002 · 31 mm

Rolex

Silver · Yellow Gold, Stainless Steel

278243-0003 · 31 mm

Rolex

Silver · Yellow Gold, Stainless Steel

278243-0004 · 31 mm

Rolex

Champagne · Yellow Gold, Stainless Steel

278243-0013 · 31 mm

Rolex

Champagne · Yellow Gold, Stainless Steel

278243-0014 · 31 mm

Rolex

Green · Yellow Gold, Stainless Steel

278243-0015 · 31 mm

Rolex

Green · Yellow Gold, Stainless Steel

278243-0016 · 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