Rolex Datejust Lady 31 31 mm 278240BMOPDBJ Steel/White Gold/Diamonds Black Mother of Pearl Rolex Datejust Lady 31 31 mm 278240BMOPDBJ…

1. What makes the Rolex Datejust Lady 31 reference 278240BMOPDBJ special?
Reference 278240BMOPDBJ combines a black mother-of-pearl dial, a custom diamond-set bezel, and Oystersteel with 18k white gold to create one of the most visually luxurious configurations in the Datejust 31 family. The organic iridescence of the black mother-of-pearl means every dial is unique, making each watch a one-of-a-kind object. These elements together place the 278240BMOPDBJ firmly at the intersection of haute horlogerie and fine jewelry.

2. What movement powers the Rolex Datejust Lady 31 278240BMOPDBJ?
The watch is powered by a Rolex automatic self-winding movement, consistent with the Datejust family's long tradition of in-house mechanical calibers. Rolex automatic movements are renowned for their reliability, precision, and long-term serviceability. No specific caliber number has been confirmed for this listing, so we recommend contacting Bizak & Co. directly for the most detailed technical information on this particular piece.

3. What is the case size of the Datejust Lady 31 278240BMOPDBJ?
The case measures 31mm in diameter, placing it in Rolex's mid-size category—larger than the classic Lady-Datejust 28mm but more refined than the full-size 36mm Datejust. This 31mm dimension is a popular choice for wearers who want a watch with visible presence and easy legibility while maintaining an elegant, feminine proportion. The Oystersteel and white gold case also contributes a satisfying weight and solidity on the wrist.

4. Is the Rolex Datejust Lady 31 278240BMOPDBJ suitable for everyday wear?
Yes—despite its diamond and mother-of-pearl appointments, the Datejust Lady 31 is built to Rolex's exacting Oyster standards, with a water resistance rating of 100 meters (330 feet) and a robust Oyster case construction. It transitions effortlessly from boardroom meetings and formal dinners to more relaxed daytime settings. The Jubilee bracelet's flexible five-piece link design also ensures day-long comfort.

5. What makes the black mother-of-pearl dial so desirable?
Black mother-of-pearl is a natural organic gem material whose surface shifts in color and depth depending on light angle, creating an almost living, iridescent effect that no painted or lacquered dial can replicate. Because it is a natural material, no two dials are ever exactly alike, giving each 278240BMOPDBJ its own unique character. Combined with diamond hour markers, the result is a dial that is simultaneously sporty, dramatic, and deeply luxurious.

6. How can I buy the Rolex Datejust Lady 31 278240BMOPDBJ from Bizak & Co.?
You can browse this reference and our full inventory of luxury watches at bizakandco.com, or contact our team directly to ask questions, request additional photos, or discuss pricing and availability. Bizak & Co. specializes in pre-owned and grey-market Rolex and is not an authorized Rolex dealer, which often means more competitive pricing on sought-after references. Our specialists are happy to guide you through every step of the purchase process.