Rolex Day-Date 36 36 mm 118348BMJDO Yellow Gold/Diamonds Black Mother of Pearl

The Rolex Day-Date has carried the title of the world's most prestigious watch since its debut in 1956, the first wristwatch to display the day of the week spelled out in full alongside the date. Crafted exclusively in precious metals, it has adorned the wrists of heads of state, industry titans, and cultural icons across every decade of its production. Reference 118348BMJDO represents the 36mm generation of the Day-Date — a size that honors the watch's original proportions and carries an unmistakable heritage weight that the larger 40mm variant simply cannot replicate.

The case of the 118348BMJDO is fashioned entirely from 18k yellow gold, a warm and enduring metal that Rolex works to an extraordinary standard of polish and finishing. At 36mm in diameter, the case wears with effortless elegance, suitable for a range of wrist sizes and equally at home at a boardroom table or a black-tie gala. Rolex rates this reference water-resistant to 100 meters (330 feet) thanks to the screw-down Twinlock crown and the hermetically sealed Oyster case — a reminder that beneath all the diamonds lies thoroughly Swiss engineering.

The bezel of this reference is set with a continuous band of brilliant-cut diamonds, creating a halo of light that frames the dial and elevates the watch firmly into high-jewelry territory. That dial itself is fashioned from black mother-of-pearl, a material prized for its organic iridescence — no two dials are identical, as the nacre shifts between deep obsidian and spectral flashes of blue, green, and violet depending on the angle of incident light. Diamond hour markers replace the conventional applied indices, ensuring the entire dial surface is a study in precious material.

Powering the 118348BMJDO is an automatic mechanical movement, as befits any serious Swiss dress watch. Rolex's in-house movements are renowned for their chronometric precision, having been held to COSC-certified chronometer standards and, in modern references, the brand's own more stringent Superlative Chronometer certification. The result is a watch that does not merely look exceptional but keeps time with the accuracy its owner deserves.

The Oyster bracelet fitted to this reference offers three-point security — a broad, integrated link design that sits flat against the wrist and tapers gracefully toward the clasp. In 18k yellow gold the bracelet adds substantial heft and presence, while remaining comfortable for extended wear. Alternate Day-Date references of this era were offered on the President bracelet, making the Oyster configuration of the 118348BMJDO a slightly less common and arguably sportier choice within the Day-Date family.

Bizak & Co. is proud to offer the Rolex Day-Date 36 reference 118348BMJDO to discerning collectors and buyers across the United States. Whether you are adding a certified pre-owned showpiece to an established collection or purchasing your first Rolex Day-Date, our team brings deep market knowledge and a commitment to authenticity and client satisfaction. Contact us directly at bizakandco.com to buy this watch online, ask about condition details, or explore additional Day-Date references currently in inventory.