Datejust 31 Rose Gold / Diamond / Grey / President

About This Watch

The Rolex Datejust 31, in its 278285RBR-0021 iteration, embodies a refined balance of tradition and modernity, distinguished by its rose gold case, diamond-set bezel, and a dial that merges sophistication with understated elegance. The grey sunburst dial, a hallmark of Rolex’s mastery in surface treatment, catches light with a subtle, rhythmic depth, while the stick indices and hands contribute to a clean, legible aesthetic that honors the Datejust collection’s legacy since its introduction in 1945. This reference, part of a lineage revered for its timeless design and precision, is elevated by the inclusion of a President bracelet—a symbol of Rolex’s commitment to comfort and luxury in its most iconic strap. At its core, the watch is powered by the Caliber 2236, an automatic movement certified as a chronometer for its accuracy and reliability. This mechanical heart, paired with a 100-meter water resistance, ensures the Datejust 31 is as functional as it is beautiful, a testament to Rolex’s engineering heritage. The closed case back and sapphire crystal further underscore the brand’s dedication to durability and clarity, allowing the wearer to appreciate the intricate craftsmanship within. This watch is for those who value

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.

278285RBR-0021 is one of 12 executions of the 278285RBR base reference. Underneath they are the same watch; what separates this one is a grey sunburst dial and a rose gold case.

Rolex

White · Rose Gold

278285RBR-0005 · 31 mm

Rolex

Brown · Rose Gold

278285RBR-0006 · 31 mm

Rolex

White · Rose Gold

278285RBR-0008 · 31 mm

Rolex

Brown · Rose Gold

278285RBR-0016 · 31 mm

Rolex

Rose · Rose Gold

278285RBR-0018 · 31 mm

Rolex

Purple · Rose Gold

278285RBR-0023 · 31 mm

Rolex

Rose · Rose Gold

278285RBR-0025 · 31 mm

Rolex

Grey · Rose Gold

278285RBR-0027 · 31 mm

+ 3 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