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

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

Name: Rolex Datejust Lady 31 31 mm 278240BMOPDBJ Steel/White Gold/Diamonds Black Mother of Pearl
Brand: Rolex
SKU: 278240BMOPDBJ
Price: 11066.0 USD

Reference 278240BMOPDBJ

Full watch configuration

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

$11,066.00 ~~$11,899.00~~

Requested condition: Brand New
Requested accessories: Full Set

By Rolex

Sourced to order. We confirm the watch, condition and final price before purchase. Reference images shown.

Ask a question WhatsApp

Meet our family team Miami Beach appointments Customer reviews

Sell or trade a watch

Eligible watches: 90-day returns for store credit only. Brand-new watches and other exclusions are final sale. Return terms.

By appointment only in Miami Beach
Authentication before dispatch
Bizak & Co. Warranty

Speak with a Bizak & Co. specialist about this piece

WhatsApp|Call or Text

The Rolex Datejust Lady 31 reference 278240BMOPDBJ is a 31mm automatic watch crafted in Oystersteel and 18k white gold, featuring a striking black mother-of-pearl diamond dial paired with a custom diamond-set bezel and a classic Jubilee bracelet. This combination of materials delivers a piece that balances Rolex's legendary precision with unmistakable feminine elegance.

Reference 278240BMOPDBJ stands out for its interplay of diamonds, lustrous black mother-of-pearl, and the refined proportions of the 31mm mid-size case—making it equally at home at a formal dinner or an afternoon in the city. Contact Bizak & Co. today to inquire about purchasing this exceptional Rolex Datejust Lady 31 or to explore our full inventory of luxury timepieces.

Compare it across every Datejust Lady 31 reference we carry, or browse the full Rolex collection at Bizak & Co.

Buy this Datejust Lady 31, trade in your current watch, or sell us yours. Contact Bizak & Co. to make an offer or request a fair-market valuation.

Not the exact one you’re looking for?

Source your dream watch

The Rolex Datejust is the archetype of the classic dress watch—a model that has graced wrists since 1945 and remains the definitive reference for elegant, date-displaying automatic watches. Over its decades-long history the Datejust has continuously evolved in materials, dial options, and case proportions while retaining the instantly recognizable silhouette that made it iconic. The Lady 31, positioned as a mid-size expression of the collection, offers a 31mm case that appeals to those who desire a refined, feminine scale without sacrificing any of the watch's architectural presence.

Reference 278240BMOPDBJ represents one of the most glamorous configurations available in the current Datejust 31 lineup. The case and bracelet combine Oystersteel—Rolex's proprietary corrosion-resistant alloy—with 18k white gold accents, a pairing that gives the watch a bright, jewel-like quality on the wrist. The custom diamond-set bezel encircles the case with brilliant-cut stones that catch light from every angle, elevating what is already a sophisticated timepiece into genuine fine-jewelry territory.

The dial is perhaps the most captivating element of this reference. Black mother-of-pearl is an organic gem material harvested from mollusc shells, and no two pieces are identical—each dial exhibits its own constellation of iridescent shifts, moving from deep midnight blue to violet to silver depending on how light falls across its surface. The diamond hour markers punctuate this living canvas with precision, ensuring legibility while adding to the overall sense of luxury that defines the 278240BMOPDBJ.

Powering the watch is a Rolex automatic movement, a self-winding caliber that reflects the brand's decades of in-house horological development. The Oyster case that houses this movement is rated to 100 meters (330 feet) of water resistance, meaning the watch is as practical as it is beautiful—capable of accompanying its wearer through daily life without a second thought about moisture or splashing. The Jubilee bracelet, a five-piece link design first introduced alongside the original Datejust in 1945, completes the package with its supple, elegant drape and secure clasp.

Bizak & Co. is a trusted pre-owned and grey-market luxury watch dealer committed to offering clients carefully sourced Rolex timepieces at compelling prices. Purchasing the Rolex Datejust Lady 31 278240BMOPDBJ from Bizak & Co. means working with knowledgeable specialists who can answer your questions, walk you through the details of the specific piece on offer, and ensure a smooth, confident transaction. Browse our inventory at bizakandco.com or reach out directly to discuss this reference—we are here to help you find the perfect watch.

Reference: 278240BMOPDBJ
Model: Datejust Lady 31
Movement: Automatic
Case material: Two-Tone
Bracelet material: Two-Tone
Dial: Black mother-of-pearl with diamonds
Case size: 31mm
Requested condition: Brand New
Requested accessories: Full Set

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.

Certified Authenticity

Every watch is authenticated before delivery.

Real Family Business

You're buying from genuine people, 30 years in business.

Bizak & Co. Warranty

Every watch is checked by us before shipping.

5 Years Warranty

Every watch you buy from us is backed by our 5-year warranty—because luxury should come with long-term peace of mind.

If anything goes wrong mechanically due to a manufacturing issue, we’ll take care of it. No stress. No surprises.

Because trust isn’t built in a transaction—it’s built over time.

90-Day Returns for Store Credit

Eligible watches may be returned within 90 days for store credit. Brand-new watches and other exclusions are final sale.

Read eligibility, condition requirements, and exclusions.

Insured delivery

Insured shipping

U.S. overnight shipping is $100; international shipping is $500. Dispatch takes 2–3 business days after your wire clears. International transit times vary. Shipping details.