Rolex Datejust 31 31 mm 278240BRJ Steel Blue

The Rolex Datejust is widely regarded as the archetype of the classic dress sport watch, and the Datejust 31 distills that legacy into a versatile 31 mm case that suits a broad range of wrists. First introduced in 1945 as the world's first self-winding wristwatch to display the date in a window at 3 o'clock, the Datejust has since become one of the most recognized watch references in horological history. Reference 278240BRJ represents the modern generation of this storied line, engineered to Rolex's current exacting standards while preserving every design cue that made the original iconic.

The case and bracelet of the 278240BRJ are crafted in Rolex's proprietary 904L Oystersteel, a corrosion-resistant alloy that polishes to a brilliance uncommon among stainless steel watches. At 31 mm, the Oyster case strikes the ideal balance between understated elegance and legible presence on the wrist. The domed bezel — smooth, unadorned, and polished — frames the dial with a classicism that keeps attention squarely on the watch's most captivating feature: its vivid blue sunburst dial.

The bright blue dial on this reference is set with Roman numeral hour markers, lending the watch an unmistakably formal, jewelry-forward personality. Blue dials have long been among the most sought-after configurations in the Datejust range, prized for their ability to shift from deep midnight tones in low light to a lively cerulean in direct sunlight. The Roman numerals amplify that dressy sensibility, echoing the aesthetic of traditional Swiss pocket watches while remaining entirely at home on a contemporary timepiece.

The five-link Jubilee bracelet, introduced alongside the original 1945 Datejust, is widely considered one of the most comfortable and beautiful metal bracelets ever produced. Its alternating polished center links and brushed outer links create a play of light and texture that complements the domed bezel perfectly. The bracelet terminates in Rolex's Crownclasp, a concealed folding clasp that provides a clean profile on the wrist and allows for subtle adjustments in sizing.

Powering the 278240BRJ is an automatic movement, allowing the watch to wind itself through the natural motion of the wearer's wrist. Rolex automatic movements are assembled and regulated in-house to chronometer precision standards certified by the Swiss Official Chronometer Testing Institute (COSC), ensuring accuracy you can rely on day after day. The movement is housed within Rolex's Oyster case, which provides water resistance to 100 meters (330 feet), giving this elegant timepiece genuine everyday resilience.

Bizak & Co. is proud to offer this Rolex Datejust 31 ref. 278240BRJ to discerning buyers who appreciate the intersection of heritage design and contemporary craftsmanship. Whether you are adding a cornerstone piece to a growing collection or purchasing your first fine Swiss watch, the 278240BRJ delivers enduring value, iconic style, and the unmatched assurance of the Rolex name. Reach out to our team at bizakandco.com to inquire about availability, pricing, and how to buy this reference online.