Rolex Datejust 31

Overview

The Rolex Datejust 31 Ref. 278384RBR is a refined interpretation of one of the most recognisable watches in modern horology. Measuring 31mm across, it combines the enduring proportions of the Datejust with a luxurious pairing of Rolex Oystersteel and 18ct white gold. Its diamond-set bezel and radiant sunray blue dial give the watch an unmistakably elevated presence, while the balanced size keeps it versatile enough for both formal occasions and everyday wear.

This example brings together Rolex’s characteristic precision, practicality and understated sophistication. Brilliant-cut diamond hour markers illuminate the blue dial, and the date display at 3 o’clock is enlarged by the familiar Cyclops lens. Beneath the scratch-resistant sapphire crystal, the self-winding Rolex Calibre 2236 provides a stated power reserve of approximately 55 hours. With 100-metre water resistance, this is a luxury watch designed not merely to be admired, but to be worn.

For collectors seeking a polished and contemporary Rolex, the Datejust 31 occupies an especially appealing position. It retains the instantly recognisable Datejust language while offering a more compact case, precious-metal detailing and a dial configuration that feels both classic and distinctive. It is an elegant choice within our selection of dress & classic watches, suited to anyone who values enduring design over passing fashion.

Brand and reference history

Rolex introduced the original Datejust in 1945 to mark the company’s 40th anniversary. Its defining innovation was the date aperture at 3 o’clock that changed automatically at midnight, a feature that helped establish the Datejust as one of the most influential everyday watches ever made. Over subsequent decades, Rolex refined the model’s movements, cases, bracelets and dials without losing its fundamental identity.

The Datejust 31 represents the modern expression of this long-running design. The 31mm format sits between the traditional smaller Datejust proportions and the larger contemporary case sizes, giving it a versatile character that appeals to a broad range of wrists. Reference 278384RBR combines Oystersteel with an 18ct white-gold fluted bezel set with diamonds, creating a discreetly opulent interpretation of the model.

Rolex’s approach to evolution is evident in this reference. The watch remains immediately identifiable through its date window, Cyclops lens, Oyster case architecture and carefully considered dial layout, yet the technical platform is thoroughly modern. For those comparing different Rolex watches, this Datejust offers an effective balance of heritage, daily practicality and precious detailing.

Dial, hands and design detail

The sunray blue dial is the visual focus of this Datejust 31. Its surface catches and reflects light in changing tones, moving from deep, saturated blue to brighter flashes as the wrist moves. This gives the watch a sense of depth without compromising legibility. Blue is particularly effective on the Datejust, introducing a contemporary note while retaining the restrained elegance expected of a Rolex classic.

Brilliant-cut diamond hour markers provide the dial with its defining luxury detail. They are carefully positioned to preserve the clarity of the hour track, allowing the design to remain balanced rather than overly ornate. The polished hands are shaped for easy reading against the blue background, while the date aperture at 3 o’clock gives the dial its characteristic asymmetry and practical function.

Above the dial, the Cyclops lens magnifies the date display for quick reference. It is one of Rolex’s most recognisable functional signatures and remains as useful today as when it was introduced. The sapphire crystal is highly resistant to scratching, helping the dial retain its crisp appearance through regular wear. Together, the diamonds, sunray finish and precision-polished details create a watch that changes character subtly between indoor light, daylight and evening settings.

Case, bracelet and wearability

The 31mm Oyster case is constructed from Rolex Oystersteel and 18ct white gold. Oystersteel is selected for its resistance to corrosion and its ability to maintain a bright, refined finish, while the white-gold bezel introduces a softer lustre and a more precious edge. The bezel is set with diamonds, adding brilliance around the dial without disturbing the Datejust’s familiar silhouette.

Rolex’s Oyster case was developed as a robust protective structure for the movement. Its sealed architecture, screw-down crown and water-resistant construction support the watch’s stated 100-metre water resistance. This makes the Datejust 31 considerably more versatile than its dress-watch appearance might suggest, although sensible care remains important when wearing any finely finished and diamond-set timepiece.

The bracelet is designed to integrate closely with the case, maintaining the smooth visual flow associated with the Datejust. Its polished and satin-finished surfaces provide contrast and help the watch sit comfortably against the wrist. The overall effect is refined rather than ostentatious: the white gold and diamonds add distinction, while the Oystersteel construction keeps the watch grounded in Rolex’s practical design philosophy.

Movement and technical specification

Powering the watch is the Rolex Calibre 2236, a self-winding mechanical movement developed for precision and dependable everyday operation. It uses Rolex’s Syloxi silicon hairspring, a component designed to offer strong resistance to magnetic fields, temperature variation and shocks. The result is a movement platform intended to maintain stable performance across the changing conditions of normal wear.

The movement provides an approximate 55-hour power reserve, allowing the watch to continue running through a typical period away from the wrist. Automatic winding takes place as the watch is worn, while the movement can also be wound manually when required. As with any mechanical watch, performance depends on use, environment and servicing, but the Calibre 2236 represents Rolex’s modern approach to compact, robust mechanical engineering.

• Model: Rolex Datejust 31
• Reference: 278384RBR
• Case diameter: 31mm
• Case materials: Rolex Oystersteel and 18ct white gold
• Bezel: Diamond-set
• Dial: Sunray blue with brilliant-cut diamond hour markers
• Movement: Rolex Calibre 2236
• Winding: Self-winding mechanical
• Power reserve: Approximately 55 hours
• Crystal: Scratch-resistant sapphire
• Water resistance: 100 metres
• Date display: At 3 o’clock with Cyclops lens

Sizing and how it wears

A 31mm case offers an exceptionally adaptable wearing experience. It has enough presence to be immediately legible and visually confident, but it remains compact and elegant compared with larger modern sports and luxury watches. The proportions are particularly well suited to wrists that favour traditional sizing, while still offering sufficient dial space for the diamond markers and date display to read clearly.

The Datejust 31 wears as a polished, versatile watch rather than a purely formal piece. Its blue dial and diamond bezel make it effective with evening clothing, but the Oystersteel construction and 100-metre water resistance support regular daytime use. The integrated bracelet helps the case sit securely, and the modest diameter makes it comfortable beneath a cuff or alongside other jewellery.

On the wrist, the design is best understood as confident refinement. The blue dial provides colour and presence, the white-gold bezel catches the light, and the steel case prevents the overall impression from becoming too delicate. Buyers considering a smaller or more traditional Datejust can also compare this model with the broader Rolex Datejust family to see how case size and configuration affect wrist presence.

Collectability and market value

The Datejust is one of Rolex’s foundational models, and its longevity gives it a strong position within the wider pre-owned market. Rather than relying on short-lived design trends, it draws value from recognisable proportions, consistent demand and the practical appeal of a date complication. The 31mm size further broadens its audience, sitting comfortably between more compact traditional watches and larger contemporary formats.

Reference 278384RBR has several qualities that make it especially attractive to collectors and enthusiasts. The combination of Oystersteel and white gold gives it the two-tone character associated with Rolex while maintaining a cool, modern appearance. The diamond-set bezel and diamond hour markers add genuine luxury specification, and the sunray blue dial is both distinctive and commercially sought after.

Our price for this watch is £14,490. As with all pre-owned luxury watches, market value is influenced by condition, completeness, servicing history, demand for the exact reference and the quality of its configuration. The strength of this Datejust lies in its combination of recognisable Rolex heritage, a technically current movement and elevated detailing that remains wearable rather than purely decorative.

Authenticity, condition and servicing

Authenticity is central to the purchase of any pre-owned Rolex. Before a watch is offered for sale, its reference, construction, movement and visible details should be assessed carefully and consistently. Particular attention is given to the relationship between the case, bracelet, dial, bezel, date display and movement, ensuring that the watch presented corresponds with the model described.

Condition is equally important. A polished case, diamond-set bezel and finished bracelet each respond differently to previous wear, so evaluation must consider surface marks, edge definition, bracelet condition, crystal clarity and the presentation of the dial. The information supplied for this watch identifies the model and its specification but does not state a separate service history or detailed condition grade; buyers should therefore rely on the specific listing information and our direct guidance for the current example.

Mechanical watches benefit from periodic professional attention, and service timing depends on age, use and observed performance. Water resistance should also be checked periodically, particularly if the watch is worn around water. Any future servicing should be entrusted to a suitably qualified specialist familiar with Rolex movements, sapphire crystals, precious-metal components and diamond-set bezels.

Buying this watch from us

Buying a pre-owned Rolex should be an informed and reassuring experience. This Datejust 31 Ref. 278384RBR is offered at £14,490 and is described by its precise reference, 31mm case size, Oystersteel and white-gold construction, diamond-set bezel, sunray blue dial and Calibre 2236 movement. These details allow you to assess the watch on its actual specification rather than on a generic model description.

Our role is to provide clear information so you can decide whether the watch suits your collection, wardrobe and expectations. We can discuss the appearance of the dial and bezel, the way the 31mm case wears, the practical benefits of the date complication and the significance of the movement. If you are comparing this piece with other Rolex models, we can also help explain the differences in proportion, materials and design.

The result is a Datejust with a particularly strong mix of elegance and utility. Its diamond detailing gives it occasion-ready appeal, while the Oyster case, automatic movement and 100-metre water resistance keep it grounded in everyday wearability. For a buyer seeking a distinctive yet enduring Rolex, this reference offers a sophisticated route into one of the brand’s most important families.

Frequently asked questions

What is the Rolex Datejust 31 Ref. 278384RBR?

It is a 31mm Rolex Datejust featuring an Oystersteel and 18ct white-gold case, a diamond-set bezel, a sunray blue dial with brilliant-cut diamond hour markers and the self-winding Rolex Calibre 2236 movement.

How much does this Rolex Datejust 31 cost?

This watch is offered at £14,490. The price reflects the specific reference and its combination of white gold, Oystersteel, diamond detailing, blue dial and modern Rolex movement.

Is the watch suitable for everyday wear?

Yes. Its Oyster case, scratch-resistant sapphire crystal, self-winding movement and stated 100-metre water resistance make it practical for regular wear. However, sensible care is recommended because it includes a diamond-set bezel and finely finished surfaces.

What movement does the watch use?

The watch is powered by Rolex Calibre 2236, an automatic mechanical movement with a Syloxi hairspring and an approximate 55-hour power reserve.

What does the Cyclops lens do?

The Cyclops lens is positioned over the date window at 3 o’clock and magnifies the display, making the date easier to read at a glance.

Why choose a 31mm Datejust?

The 31mm case offers a balanced middle ground: it is compact and elegant while retaining strong wrist presence and excellent dial legibility. It suits buyers who prefer classic proportions with modern Rolex detailing.