Crafted entirely in 18kt yellow gold, the Day-Date 40 reference 228348RBR-0008 features a 40mm Oyster case built around a monobloc middle case with a screw-down case back and screw-down winding crown secured by the Twinlock double waterproofness system. The bezel is set with diamonds, while scratch-resistant sapphire crystal with a Cyclops lens over the date protects the warm champagne dial beneath. Water resistance extends to 100 metres / 330 feet.
The President bracelet in 18kt yellow gold, composed of semi-circular three-piece links, fastens via a concealed folding Crownclasp — a combination that has long defined the Day-Date's distinctive presence on the wrist. The dial displays the day and date through instantaneous apertures with secure rapid-setting, complemented by centre hour, minute, and seconds hands and a stop-seconds function for precise time setting.
Inside beats the Calibre 3255, a perpetual mechanical self-winding movement from Manufacture Rolex. Bidirectional winding via the Perpetual rotor delivers approximately 70 hours of power reserve, while a paramagnetic blue Parachrom hairspring and high-performance Paraflex shock absorbers contribute to the movement's resilience. The watch holds Superlative Chronometer certification, reflecting COSC testing followed by Rolex's own standards after casing.
