Datejust 31 Rolesor Yellow Fluted Diamond / Oyster / Black MOP

About This Watch

The Rolex Datejust 31, in its Rolesor Yellow Fluted Diamond iteration, embodies the quiet authority of a timepiece that has defined elegance for generations. With a 31mm case that balances modernity and tradition, this watch marries the Datejust collection’s enduring legacy—established in 1945 as the first self-winding waterproof chronometer wristwatch with a date display—to a contemporary aesthetic refined by meticulous craftsmanship. The black mother-of-pearl dial, shimmering with a subtle iridescence, is framed by a fluted bezel set with 18k yellow gold, its polished edges catching light with understated sophistication. Gem-set indexes and stick hands add a refined contrast, ensuring legibility without overpowering the dial’s minimalist allure. At its core, the watch is powered by Rolex’s Caliber 2235, an automatic movement celebrated for its precision, reliability, and in-house innovation. Encased in an Oyster stainless steel middle case and protected by a sapphire crystal, it is built to endure while maintaining a presence that is both discreet and distinguished. The closed case back and 100-meter water resistance further underscore its practicality without compromising its role as a symbol of status. This watch is for the discerning individual who values heritage, craftsmanship, and subtlety. It suits occasions where presence matters—whether in the boardroom, at a gala, or on the wrist of someone who understands that true luxury lies in the details that remain unspoken.

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. 48 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.

178313-0064 is one of 31 executions of the 178313 base reference. Underneath they are the same watch; what separates this one is a black dial.

Rolex

Black · Yellow Gold, Stainless Steel

178313-0001 · 31 mm

Rolex

White

178313-0002 · 31 mm

Rolex

Champagne · Yellow Gold, Stainless Steel

178313-0006 · 31 mm

Rolex

Silver · Yellow Gold, Stainless Steel

178313-0013 · 31 mm

Rolex

Champagne · Yellow Gold, Stainless Steel

178313-0017 · 31 mm

Rolex

Black · Yellow Gold, Stainless Steel

178313-0021 · 31 mm

Rolex

Black

178313-0026 · 31 mm

Rolex

Silver · Yellow Gold, Stainless Steel

178313-0027 · 31 mm

+ 22 more variants in this family.

The 2235 is the small Rolex automatic of the six-digit generation, a 20 mm movement with a date. It carried the Datejust 31 and the 26 mm Lady-Datejust from around 2000 until the 2236 replaced it. It powers 733 watches in this library. It has 31 jewels, a 48-hour reserve and a beat of 28,800 vph, and every one is a COSC chronometer. It is the same architecture as the [2236](/calibers/rolex-2236) that followed, without the silicon Syloxi hairspring and with seven hours less reserve; the [2236 piece](/blog/the-rolex-2236-the-most-common-movement-in-this-library) explains what changed. The library finds it almost entirely in the [Datejust 31](/brands/rolex/datejust-31): 682 references, the 1782xx generation, whose 45 base references and hundreds of dial variants make that collection the largest here. The 26 mm [Lady-Datejust](/brands/rolex/lady-datejust) of the 1791xx generation accounts for 29, the [Pearlmaster](/brands/rolex/pearlmaster) 29 mm and 34 mm for 19, and the 35 mm Yacht-Master for 3. A six-digit Datejust 31 reference is a 2235; the seven-digit one is a 2236, as the [reference-number guide](/blog/how-to-read-a-watch-reference-number) explains. The 2231 was its no-date sibling in the Oyster Perpetual, and the [3135](/calibers/rolex-3135) its counterpart in the 36 mm cases.

732 other watches in the library run the Rolex 2235.

Rolex

Datejust 31 Yellow Gold Diamond / Oyster / Black MOP

178158-0056 · 31 mm

Rolex

Datejust 31 Stainless Steel Diamond / Oyster / Pink MOP

178384-0061 · 31 mm

Rolex

Datejust 31 Rolesor Everose Domed / Jubilee / Black MOP

178241-0043 · 31 mm

Rolex

Datejust 31 Yellow Gold Domed / Oyster / Champagne Roman

178248-0079 · 31 mm