Rolex Datejust 31 — Reference 278344RBR-0020
Introducing the exquisite Rolex Datejust 31 ref. 278344RBR-0020, a refined embodiment of Rolex’s mastery in combining gem-set artistry with technical precision. With a 31 mm White Rolesor case, domed diamond bezel, and graceful mint-green dial, this timepiece radiates fresh elegance and enduring sophistication.
Case & Construction
The case is rendered in White Rolesor, Rolex’s signature combination of Oystersteel and 18 ct white gold — offering both durability and luminous beauty. Measuring a balanced 31 mm across, the case follows Rolex’s Oyster architecture: monobloc middle, screw-down back, and a Twinlock winding crown ensure water resistance to 100 meters / 330 feet. Over the dial rests a domed, diamond-set bezel, forming a halo of brilliance that frames the dial with refined sparkle. The dial is protected by a scratch-resistant sapphire crystal with the signature Cyclops lens magnifying the date window at 3 o’clock.
Dial & Distinctive Elements
One of the standout features of ref. 0020 is its mint-green sunray dial, which bathes the face in fresh, luminous tones. The sunray texture ensures that light plays elegantly across the surface, creating subtle gradients and depth. Applied stick (baton) hour markers and sleek polished hands deliver a clean, legible aesthetic suited to the dial’s soft hue. At 3 o’clock, the date aperture is enhanced by Rolex’s Cyclops magnification for easy reading. The harmonious contrast between mint-green dial and diamond bezel gives the watch a luminous yet composed presence.
Movement & Performance
Driving the ref. 278344rbr-0020 is Rolex’s in-house Calibre 2236, a self-winding mechanical movement designed for high precision. It offers a power reserve of approximately 55 hours, balancing performance with practicality. Rolex certifies the completed watch under its Superlative Chronometer standard, meaning it runs within –2/+2 seconds per day after casing. The movement employs advanced technologies — including instantaneous date change and a stop-seconds function — to ensure reliability, precise setting, and long-term stability.
Bracelet & Wearability
This model is offered with Rolex’s classic Jubilee bracelet, composed of flexible five-piece links in Oystersteel for a refined and comfortable fit. It closes via the concealed folding Crownclasp, preserving an elegant, uninterrupted bracelet profile. Together, the 31 mm case dimension and Jubilee bracelet ensure the watch maintains graceful proportions on a variety of wrist sizes.
Unique Highlights & Selling Points
- The mint-green sunray dial is uncommon, offering a refreshing and luminous signature not often seen in the Datejust collection.
- The domed diamond bezel imparts a halo of light that beautifully accentuates the dial without overpowering it.
- White Rolesor merges strength and elegance — steel for resilience, white gold for refined luminescence.
- Powered by Calibre 2236, the timepiece balances decorative beauty with precise horological performance.
- The Jubilee bracelet with concealed Crownclasp ensures comfort, elegance, and visual continuity.
- At 31 mm, the reference sits between bold and delicate, making it ideally versatile for daily wear or special occasions.
In summary, the Rolex Datejust 31 ref. 278344RBR-0020 is a beautifully balanced expression of Rolex’s craftsmanship. Its mint-green dial, diamond halo bezel, and refined proportions harmonize with the precision of its internal movement — creating a timepiece that is as luminous in design as it is reliable in performance. Whether worn for elevated daily wear or treasured for formal settings, it stands as a statement of quiet luxury and long-lasting horological excellence.

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