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

The Rolex Day-Date 40 reference 228348RBR is the definitive expression of horological prestige — a certified brand-new 40mm timepiece crafted entirely in 18k yellow gold, set with a full round-diamond bezel, and finished with a rich black dial. Since its debut in 1956, the Day-Date has carried a singular distinction: it was the first wristwatch to display both the date and the full day of the week spelled out in a window, and Rolex has never offered it in any metal other than precious gold or platinum. That heritage alone places every Day-Date in a class of its own.

The 228348RBR belongs to the second generation of the 40mm Day-Date family, introduced when Rolex expanded the case diameter from the classic 36mm to 40mm, honoring a contemporary preference for a more commanding wrist presence without sacrificing the refined proportions that define the model. The 40mm oyster case is hewn from 18k yellow gold, polished and brushed to Rolex's exacting tolerances, and the bezel is pavé-set with round brilliant-cut diamonds that catch light from every angle. This configuration transforms the watch from a simple timekeeping instrument into a genuine jewel.

The black dial provides a dramatic, high-contrast backdrop that makes the day and date displays immediately legible while giving the watch an air of evening-ready sophistication. Black dials on yellow gold Day-Date references have long been coveted by collectors precisely because the warm gold indices and hands glow against the dark surface, creating a tension between opulence and restraint that few watches achieve.

Power comes from Rolex's self-winding automatic movement, delivering the chronometric precision expected of a Superlative Chronometer. The watch is water resistant to 100 meters (330 feet) — a specification that underscores Rolex's commitment to engineering integrity even in its most jeweled, dress-oriented references. The President bracelet, crafted in matching 18k yellow gold with its characteristic three-link semi-circular design and concealed Crownclasp, completes the package with a level of comfort and security that is wholly in keeping with the watch's status.

For collectors and first-time buyers alike, the 228348RBR represents one of the most complete statements a watch can make. Its combination of precious metal, diamond bezel, and iconic bracelet means it holds enduring desirability on the secondary market while serving beautifully as an everyday companion or a formal dress watch. At Bizak & Co., this reference is offered certified authentic and brand new, giving you complete confidence in provenance and condition. Reach out to our team at bizakandco.com to purchase this Rolex Day-Date 40 online or to learn more about our white-glove service, secure nationwide shipping, and available financing.