Rolex Datejust Lady 31 31 mm 278240BLUDO Steel/White Gold/Diamonds Blue

The Rolex Datejust is one of the most storied and instantly recognizable watch families ever produced, and the Lady 31 — positioned between the classic 28mm Lady-Datejust and the full-size 36mm — occupies a sweet spot that appeals to a wide range of wrists and personal styles. Reference 278240BLUDO represents the Datejust 31 at its most glamorous, combining the durability of Rolex's proprietary Oystersteel with the warmth and prestige of 18k white gold and the dazzle of diamond embellishment. It is a watch that transitions effortlessly from the boardroom to a formal evening event, and it has become one of the most searched Rolex ladies' references among collectors and enthusiasts worldwide.

The case measures 31mm in diameter — a size that wears with confident presence on a mid-size wrist without overwhelming it. Oystersteel, Rolex's own 904L stainless steel alloy, is renowned for its exceptional corrosion resistance and its ability to take and hold a mirror polish, giving the case and Oyster bracelet their characteristic luster. The integration of 18k white gold elements elevates the reference beyond a purely steel watch, lending it a two-tone refinement that has been a Datejust hallmark since the line's earliest decades.

The blue dial is the visual centerpiece of this reference. Set with diamonds that catch the light with every movement of the wrist, it delivers a level of sparkle that is both understated in its arrangement and dramatic in its effect. Complementing the dial is a custom diamond-set bezel that frames the case and amplifies the watch's jewelry-watch credentials. The dial and bezel together make reference 278240BLUDO immediately distinguishable, even among the broad Datejust family, and help explain why this particular configuration commands strong demand on the pre-owned and gray market.

Beneath the Oyster case, an automatic movement drives the watch with the reliability Rolex is famous for. The Oyster case and the Oyster bracelet both reflect Rolex's commitment to robustness: the watch carries a water resistance rating of 100 meters, meaning it can accompany its owner through the demands of daily life — including rain, swimming, and casual water exposure — without hesitation. The Oyster bracelet itself is one of the most comfortable and durable three-link bracelets in watchmaking, secured by the Oysterlock safety clasp for a secure and precise fit.

Buying a Rolex Datejust 31 reference 278240BLUDO from Bizak & Co. means working with a trusted luxury watch dealer that takes pride in offering carefully curated timepieces and transparent, knowledgeable service. Whether you are adding this reference to a growing collection or purchasing your first significant luxury watch, the team at Bizak & Co. is ready to answer every question and guide you through the acquisition process. Browse our inventory at bizakandco.com or reach out directly — we invite you to experience the Bizak difference.