Datejust 31 Rolesor Yellow Fluted Diamond / Oyster / Black MOP Computer

About This Watch

The Rolex Datejust 31, in its Rolesor Yellow Fluted Diamond iteration, marries the brand’s enduring legacy with a contemporary refinement that underscores its position as a cornerstone of modern horology. The black mother-of-pearl dial, framed by a 18k yellow gold fluted bezel, exudes a quiet opulence, its subtle iridescence heightened by the gem-set indexes that catch light with measured precision. The stick hands, paired with a black MOP dial, evoke the clean minimalism of the Datejust collection’s original 1945 design, reimagined for a new era of wearability. The Oyster case, with its 31mm diameter and 100-meter water resistance, balances proportion and durability, ensuring the watch remains as functional as it is elegant. At its heart lies the Caliber 2235, a self-winding movement with a date display that exemplifies Rolex’s mastery of mechanical engineering. The sapphire crystal, paired with a closed case back, reinforces the watch’s robust construction while allowing the intricate mechanics to remain discreetly visible. This piece is for the individual who values understated sophistication—a collector who appreciates the interplay of tradition and innovation, or a discerning professional seeking a timepiece that commands respect without ostentation. It is equally at home on the wrist of someone navigating a boardroom or a gala, its presence a testament to enduring taste.

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.

178313-0054 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