Rolex Rolex - 178240-0039 Datejust 31 Stainless Steel Domed / Jubilee / Dark Rhodium Floral
Rolex Rolex - 178240-0039 Datejust 31 Stainless Steel Domed / Jubilee / Dark Rhodium Floral
Rolex Rolex - 178240-0039 Datejust 31 Stainless Steel Domed / Jubilee / Dark Rhodium Floral
Rolex Rolex - 178240-0039 Datejust 31 Stainless Steel Domed / Jubilee / Dark Rhodium Floral
Rolex

Datejust 31 Stainless Steel Domed / Jubilee / Dark Rhodium Floral

REF. 178240-0039

3/10

Uncommon

Case

MaterialStainless Steel
Diameter31 mm
Lug width16 mm
ShapeRound
CrystalSapphire
Case backClosed
Water resistance100 m

Dial

ColourGrey
FinishSunburst
IndexesStick / Dot Hands: Stick
HandsStick

Movement

Caliber2235
Typeautomatic
Reserve48 h
Explore caliber→

About This Watch

The Rolex Datejust 31, in its refined iteration of stainless steel with a dark rhodium floral dial, embodies the quiet authority of a timepiece that has defined elegance since its introduction in 1945. The domed case, a nod to the brand’s mid-20th-century design language, lends a subtle curvature that enhances the watch’s presence without ostentation. The sunburst grey dial, with its intricate floral pattern in dark rhodium, is a masterclass in restraint, its stick indexes and hands offering a balance of legibility and sophistication. Paired with the Jubilee bracelet—a hallmark of the Datejust collection—the watch exudes a timeless harmony of form and function, its polished stainless steel links flowing seamlessly from the case to the deployment clasp. At its core lies the Caliber 2235, an automatic movement distinguished by its high-frequency balance wheel and Parachrom hairspring, ensuring precision and resilience against magnetism. The sapphire crystal, paired with a closed case back, underscores the watch’s commitment to durability without compromising its understated allure. This model, while rooted in the Datejust’s enduring legacy, carries a distinct personality: a bridge between classic horology and contemporary refinement. It is a watch for those who value discretion as much as craftsmanship, suited to moments that demand both subtlety and permanence—whether in the boardroom, over a quiet dinner, or on the wrist of someone who understands that true luxury lies in the details that remain unseen.

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.

178240-0039 is one of 24 executions of the 178240 base reference. Underneath they are the same watch; what separates this one is a grey sunburst dial and a stainless steel case.

The 178240 family

178240-0039 is one of 24 variants sharing the 178240 base reference — same watch underneath, different dial, bezel, or bracelet execution. Browse the others:

+ 15 more variants in this family.

Inside: Caliber 2235

Explore this caliber →

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.

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