Datejust 31 Rolesor Yellow Domed Diamond / Oyster / Silver

About This Watch

The Rolex Datejust 31, in its 178343-0055 iteration, marries the brand’s enduring commitment to refinement with a contemporary reinterpretation of classic horological elegance. The case, a harmonious blend of yellow gold and stainless steel, embodies the Rolesor tradition—a hallmark of Rolex’s innovation in metallurgy since the 1930s. The dial, a luminous silver expanse, is framed by a domed yellow gold bezel set with a subtle yet deliberate arrangement of diamonds, their presence understated yet unmistakable. Stick indexes and hands, rendered in a crisp, minimalist style, lend the watch a sense of quiet authority, while the sapphire crystal ensures clarity and durability. The 31mm diameter, a nod to the Datejust collection’s heritage as a symbol of timeless wearability since its introduction in 1945, balances proportion and presence with precision. At its core, the watch houses the Caliber 2235, an automatic movement certified as a chronometer by the COSC. This mechanism, with its Parachrom balance spring and a power reserve of approximately 50 hours, exemplifies Rolex’s pursuit of reliability and accuracy. The closed caseback, paired with a water resistance of 100 meters, underscores the Oyster case’s robustness, a feature that has defined Rolex’s legacy since 1926. The watch’s design, while modern in its execution, echoes the Datejust’s original ethos: a timepiece that transcends trends, marrying functionality with enduring beauty. This watch is for those who value discretion as much as craftsmanship, seeking a companion that commands respect without demanding attention. It suits the boardroom, the gala, or the quiet

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.

178343-0055 is one of 34 executions of the 178343 base reference. Underneath they are the same watch; what separates this one is a silver dial and a yellow gold, stainless steel case.

Rolex

Green · Yellow Gold, Stainless Steel

178343-0001 · 31 mm

Rolex

Silver · Yellow Gold, Stainless Steel

178343-0002 · 31 mm

Rolex

Champagne · Yellow Gold, Stainless Steel

178343-0003 · 31 mm

Rolex

White · Yellow Gold, Stainless Steel

178343-0004 · 31 mm

Rolex

Champagne · Yellow Gold, Stainless Steel

178343-0005 · 31 mm

Rolex

White

178343-0006 · 31 mm

Rolex

White

178343-0007 · 31 mm

Rolex

Black

178343-0008 · 31 mm

+ 25 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