Rolex Datejust Lady 31 31 mm 278240BSDBO Steel/White Gold/Diamonds Black Rolex Datejust Lady 31 31 mm 278240BSDBO…

The Rolex Datejust is one of the most iconic and enduring watch designs in horological history, having introduced the instantly recognizable date window at 3 o'clock when it debuted in 1945. Across decades, it has evolved into a broad family of references spanning multiple case sizes, materials, and dial configurations. The Lady 31 occupies a particularly refined position within this lineage, sized at 31mm to suit a wide range of wrist sizes while still commanding a confident presence — neither too delicate nor too bold.

Reference 278240BSDBO represents a custom expression of the Datejust Lady 31 platform, pairing the proven Oystersteel case construction with white gold and a diamond-set bezel that elevates the watch well beyond everyday dress-watch territory. The black dial creates a dramatic contrast against the brilliance of the surrounding diamonds, drawing the eye and lending the piece a distinctive evening-ready sophistication that transitions effortlessly into daywear. The index markers on the black dial maintain legibility while reinforcing the watch's polished, dressy character.

Powering this reference is Rolex's automatic movement, a self-winding caliber that winds with the natural motion of the wearer's wrist, ensuring reliable timekeeping without the need for manual winding in daily wear. Rolex's in-house movement technology is celebrated for its precision, longevity, and resistance to magnetism and shock — qualities that make the Datejust as practical as it is beautiful. The movement is housed within the Oyster case, Rolex's signature hermetically sealed case construction, offering 100 meters (330 feet) of water resistance.

On the wrist, the 31mm case size strikes a harmonious balance: substantial enough to anchor the diamond bezel and black dial as a true focal point, yet proportioned for everyday comfort. The Oyster bracelet — Rolex's flat three-piece link design — adds to the watch's versatility, providing a secure, polished fit that suits both formal and casual settings. The interplay of brushed and polished surfaces across the case, bezel, and bracelet amplifies the visual richness of the piece.

Buying a Rolex Datejust Lady 31 278240BSDBO from Bizak & Co. means working with a trusted luxury watch specialist committed to transparency, authenticity, and exceptional customer service. Whether you are adding to an established collection, searching for a meaningful gift, or making your first investment in a luxury timepiece, Bizak & Co. offers knowledgeable guidance every step of the way. Reach out directly through bizakandco.com to inquire about this reference, confirm current availability, and explore financing or trade-in options.