Rolex Day-Date 40 40 mm 228348RBRONXDP Yellow Gold/Diamonds Black

The Rolex Day-Date 40 ref. 228348RBRONXDP represents the absolute summit of the Day-Date collection—a 40mm creation in 18k yellow gold that pairs an intensely dramatic black onyx dial with a round diamond-set bezel and the storied President bracelet. Since its introduction, the Day-Date has been the watch of heads of state, industry leaders, and those who demand both horological excellence and undeniable presence on the wrist. The 40mm case size, introduced with the fifth-generation Day-Date, gives this reference a modern, commanding footprint that reads equally well in the boardroom and at a black-tie event.

The dial of this particular reference is where the design truly announces itself. Crafted from black onyx—a semi-precious stone prized for its deep, lustrous color and natural hardness—the dial creates a dramatic contrast against the warm glow of 18k yellow gold. Diamond hour markers scatter light across that dark canvas, while the signature Day-Date displays the full day of the week at 12 o'clock and the date at 3 o'clock, the two complications that define this model family and give it its name.

The bezel of the 228348RBRONXDP is set with round brilliant-cut diamonds, a configuration that frames the dial with continuous, scintillating brilliance. Rolex's gem-setting artisans select and position each stone for uniform sparkle and precise fit, ensuring a level of craftsmanship that matches the movement within. This diamond bezel elevates the watch beyond a horological instrument into the realm of fine jewelry.

The President bracelet—exclusive to the Day-Date—completes the package. Its three-link semi-circular design in 18k yellow gold is both ergonomic and deeply luxurious, draping the wrist with characteristic smoothness. The concealed Crownclasp integrates invisibly into the bracelet, maintaining the clean, uninterrupted lines that make the President bracelet one of the most copied and coveted designs in watchmaking history. Powering the watch is Rolex's automatic movement, delivering the precision and reliability that collectors and everyday wearers have come to expect from the crown brand.

For collectors seeking a yellow gold Day-Date 40 with a black onyx dial, diamond bezel, and President bracelet, the ref. 228348RBRONXDP is a singular choice—combining the gravitas of the Day-Date lineage with gemstone artistry and a case size that feels thoroughly contemporary. Bizak & Co. specializes in sourcing and presenting references exactly like this one, offering buyers the confidence of dealing with experienced professionals who know the Rolex market deeply. Please note that Bizak & Co. is not an authorized Rolex dealer. Reach out to our team to verify current availability, discuss pricing, or ask any questions about this remarkable timepiece.