Datejust 31 White Gold Diamond / President / Blue Diamond

About This Watch

The Rolex Datejust 31 178159-0020 stands as a masterclass in restrained opulence, blending the enduring elegance of the Datejust collection with a contemporary refinement that speaks to modern horological sensibilities. Its blue dial, finished in a sunburst pattern, captures light with a quiet sophistication, while the gem-set indexes and bezel introduce a subtle sparkle that complements rather than overwhelms. The white gold case, polished to a mirror-like sheen, frames the dial with understated authority, and the president bracelet—crafted with the same meticulous attention to detail—ensures a secure, comfortable fit that marries formality with wearability. As the flagship model of the Datejust 31 line, this reference honors the collection’s legacy of combining precision engineering with timeless design, a tradition established since its debut in 1945. Beneath the sapphire crystal lies the Caliber 2235, Rolex’s in-house automatic movement, which features a Parachrom blue balance spring and a Chronergy escapement, ensuring exceptional accuracy and resilience. These technical advancements underscore the brand’s commitment to innovation without compromising the Datejust’s classic silhouette. This watch is for the discerning individual who values discretion as much as craftsmanship, suited to occasions where presence is measured in subtlety rather than volume. It is the quiet assertion of legacy, worn with the confidence of those who understand that true luxury lies in the harmony of detail and restraint.

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.

178159-0020 is one of 36 executions of the 178159 base reference. Underneath they are the same watch; what separates this one is a blue sunburst dial and a white gold case.

Rolex

White · White Gold

178159-0001 · 31 mm

Rolex

Pink · White Gold

178159-0002 · 31 mm

Rolex

Silver · White Gold

178159-0007 · 31 mm

Rolex

Silver · White Gold

178159-0010 · 31 mm

Rolex

Grey · White Gold

178159-0011 · 31 mm

Rolex

Silver · White Gold

178159-0012 · 31 mm

Rolex

Pink · White Gold

178159-0014 · 31 mm

Rolex

Black · White Gold

178159-0015 · 31 mm

+ 27 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