Rolex Day-Date 40 40 mm 228238WMOP Yellow Gold White Mother of Pearl Rolex Day-Date 40 40 mm 228238WMOP Yellow…

The Rolex Day-Date has carried the unofficial title of the world's most prestigious wristwatch since its debut in 1956, when it became the first watch to display the full spelling of the day of the week alongside the date. Every Day-Date is crafted exclusively in precious metals, and the 40 mm generation — introduced as a modern evolution of the classic 36 mm President — brings a broader, more contemporary presence to the wrist without sacrificing the refined proportions that define the line. Reference 228238WMOP sits at the pinnacle of this tradition.

The case and integrated President bracelet are fashioned entirely from 18k yellow gold, a combination that has made the Day-Date synonymous with achievement and leadership across generations. At 40 mm in diameter, the case fills the wrist with authority while remaining elegantly wearable under a dress shirt cuff. The fluted yellow gold bezel — one of the most recognizable signatures in horology — frames the dial with rhythmic, light-catching grooves that underscore the watch's architectural confidence.

The white mother-of-pearl dial of the 228238WMOP is the defining visual statement of this reference. Mother-of-pearl, harvested from the inner lining of mollusk shells, is prized precisely because it is alive with color: creamy whites shift to soft pinks, silvers, and golds depending on the angle of light, ensuring the dial is never the same twice. Diamond hour markers punctuate the dial's surface, adding brilliance and reinforcing the luxurious character of the piece without overwhelming its organic beauty.

Powering the Day-Date 40 is a Rolex-manufactured automatic movement, built and finished in-house to the exacting standards that have earned Rolex its reputation for reliability and precision. The movement is chronometer-certified, meaning it has passed the rigorous accuracy tests of an independent Swiss certification body, and the case provides water resistance to 100 metres (330 feet) — practical assurance for a watch that is as much a daily companion as it is a collector's prize.

For collectors and first-time buyers alike, reference 228238WMOP represents one of the most complete expressions of the Day-Date 40 — combining precious metal, natural gemstone dial material, and diamond indices in a configuration that is simultaneously classic and visually spectacular. Bizak & Co. specializes in sourcing and presenting watches of exactly this caliber. Browse our current inventory, request additional photographs, or reach out directly to our team at bizakandco.com to purchase this reference or to learn more about our authentication process and purchase experience.