Rolex Day-Date 40 40 mm 228349RBRBLKSP White Gold/Diamonds Black Rolex Day-Date 40 40 mm 228349RBRBLKSP White…

The Rolex Day-Date 40 has long carried the unofficial title of the world's most prestigious wristwatch. Introduced in 1956 as the first watch to display both the date and the full day of the week spelled out in a window on the dial, the Day-Date was also the first wristwatch to be offered exclusively in precious metals — a tradition Rolex has never broken. Reference 228349RBRBLKSP belongs to the modern 40mm generation of the line, enlarged from the classic 36mm in 2015 to suit contemporary tastes while preserving every defining characteristic of the original design.

The 40mm case of the 228349RBRBLKSP is crafted entirely in 18k white gold, Rolex's own Oystersteel-alternative that delivers the cool, silvery brilliance uniquely associated with this metal. The fluted crown and Oyster case architecture — with its screw-down crown and hermetically sealed case back — give this watch a water resistance of 100 meters (330 feet), a remarkable engineering achievement for a dress watch of this caliber. The case is finished with Rolex's characteristically meticulous combination of brushed and polished surfaces that reward close inspection.

The bezel of reference 228349RBRBLKSP is set with a continuous band of round brilliant-cut diamonds, transforming the watch's profile into something that reads as jewelry as much as horology. Against the white gold case, these stones catch light from every angle and create a visual rhythm around the dial that is impossible to ignore. The black dial beneath provides a dramatic canvas that maximizes contrast, making the applied hour markers and the day and date displays immediately legible while adding an edge of contemporary boldness that distinguishes this reference from the more traditional champagne or silver-dialed variants.

Power comes from a Rolex automatic movement, ensuring the precision and reliability that the brand's reputation is built upon. Rolex manufactures its movements entirely in-house at its Geneva facilities, subjecting each caliber to testing standards that exceed official Swiss chronometer certification. The result is a watch that can be worn daily with full confidence in its timekeeping accuracy, requiring nothing more than the motion of the wrist to remain perpetually wound.

The President bracelet is perhaps the single most recognizable bracelet in fine watchmaking. Its three-semi-circular-link design was created by Rolex specifically for the Day-Date in 1956 and remains exclusive to this model and the Lady-Datejust. In 18k white gold it delivers a supple, weighty drape on the wrist that communicates luxury with every movement. The concealed Crownclasp keeps the bracelet's clean lines uninterrupted from every viewing angle.

Buying a Rolex Day-Date 40 ref. 228349RBRBLKSP from Bizak & Co. means working with a specialist dealer who sources and vets each timepiece with care. Whether you are adding a statement presidential watch to an established collection or acquiring the Day-Date as your defining single piece, Bizak & Co. offers the expertise, transparency, and service that a purchase of this significance deserves. Reach out to our team online to learn more, confirm availability, or discuss this reference in detail.