The Rolex Day-Date 40 reference 228238-0059 is a high-prestige watch featuring a 40mm case and the iconic three-piece link President bracelet, both crafted from 18k yellow gold. This model is distinguished by its unique dial made from natural black onyx, a gemstone known for its deep, jet-black appearance. The dial is further elevated by ten factory-set baguette-cut diamond hour markers, providing a striking contrast against the dark stone. The watch is framed by a signature fluted bezel and protected by a scratch-resistant sapphire crystal with a Cyclops lens over the date window at 3 o’clock.
The timepiece is powered by the manufacture calibre 3255, a self-winding mechanical movement that offers a power reserve of approximately 70 hours. Its complications include central hour, minute, and seconds hands, along with instantaneous apertures for the day of the week, spelled out in full at 12 o’clock, and the numerical date. The movement features a paramagnetic blue Parachrom hairspring and high-performance Paraflex shock absorbers, ensuring a precision of -2/+2 seconds per day. The Oyster case utilizes a Twinlock double waterproofness system to provide water resistance up to 100 meters.
General reviews of this specific reference often highlight the onyx dial as the epitome of luxury and elegance, noting that its natural origin ensures each piece is a unique work of art. Enthusiasts frequently praise the combination of yellow gold and black onyx for its timeless, classic aesthetic and significant visual weight. While some critics consider the solid gold President a bold statement that can appear flashy, it is widely respected as the flagship model of the Rolex catalog. The updated 40mm proportions are generally viewed as a modern improvement over previous larger iterations, offering a balanced fit for a variety of wrist sizes.