Housed in a 40mm 18kt white gold Oyster case, reference 228349RBR-0039 features a monobloc middle case with a screw-down case back and screw-down Twinlock winding crown, delivering water resistance to 100 metres. The bezel is set with diamonds, while scratch-resistant sapphire crystal with a Cyclops lens over the date keeps the white Roman numeral dial clearly legible from every angle.
The white gold President bracelet with its characteristic semi-circular three-piece links fastens via a concealed folding Crownclasp, providing a secure and seamless fit on the wrist. Every element of the construction reflects the Day-Date's longstanding place at the top of the Rolex collection.
At the heart of the watch is the perpetual, mechanical, self-winding Calibre 3255, certified as a Superlative Chronometer to a precision of -2/+2 seconds per day after casing. Bidirectional self-winding via the Perpetual rotor delivers approximately 70 hours of power reserve, while the paramagnetic blue Parachrom hairspring and Paraflex shock absorbers ensure consistent reliability. Day and date are displayed instantaneously in dedicated apertures with a secure rapid-setting mechanism.
