Datejust 31 Rose Gold / Diamond / Chocolate - Roman / Oyster

About This Watch

The Rolex Datejust 31 Reference 278285rbr-0015 embodies the enduring elegance of the Datejust collection, a line introduced in 1945 as one of the first wristwatches to feature a date display at the 3 o’clock position. This particular iteration marries the timeless appeal of the Datejust with a refined interplay of materials and craftsmanship. The 31mm rose gold case, polished to a warm luster, frames a brown sunburst dial that exudes understated sophistication. Roman numerals, rendered in gold, anchor the dial’s symmetry, while slender stick hands trace their path with precision. A gem-set bezel, each diamond carefully placed, adds a touch of discreet opulence, complementing the chocolate-hued dial without overpowering it. The sapphire crystal, paired with a closed case back, ensures the watch’s mechanical heart remains protected while emphasizing its polished, all-gold construction. At its core, the Datejust 31 houses the Caliber 2236, an automatic movement certified as a Swiss chronometer for its accuracy and reliability. This mechanical backbone, paired with a 100-meter water resistance, underscores the watch’s balance of everyday functionality and haute horlogerie. The 16mm lug width and rounded case profile ensure a comfortable fit, while the overall design speaks to Rolex’s mastery of proportion and detail. This watch is for the discerning individual who values heritage, precision, and a quiet statement of refinement—whether in the boardroom, at a gala, or as a treasured heirloom.

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-0015 is one of 13 executions of the 278285rbr base reference. Underneath they are the same watch; what separates this one is a brown sunburst dial and a rose gold case.

Rolex

White · Rose Gold

278285rbr-0007 · 31 mm

Rolex

White · Rose Gold

278285rbr-0009 · 31 mm

Rolex

White · Rose Gold

278285rbr-0010 · 31 mm

Rolex

White · Rose Gold

278285rbr-0011 · 31 mm

Rolex

Brown · Rose Gold

278285rbr-0012 · 31 mm

Rolex

Rose · Rose Gold

278285rbr-0017 · 31 mm

Rolex

Silver · Rose Gold

278285rbr-0019 · 31 mm

Rolex

Grey · Rose Gold

278285rbr-0020 · 31 mm

+ 4 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