Reference 228349RBR-0002 presents the Day-Date 40 in a 40mm monobloc middle case crafted from 18kt white gold, featuring a screw-down case back and a screw-down Twinlock winding crown for waterproofness to 100 metres. The bezel is set with diamonds, while a scratch-resistant sapphire crystal with a Cyclops lens over the date completes the case.
The bright black dial is fitted with index hour markers, offering a sharp, high-contrast face. The 18kt white gold President bracelet, constructed with semi-circular three-piece links, fastens via a concealed folding Crownclasp for a refined, seamless look on the wrist.
Inside runs the Calibre 3255, a perpetual mechanical self-winding movement from Rolex bearing Superlative Chronometer certification — achieving a precision of -2/+2 seconds per day after casing. A paramagnetic blue Parachrom hairspring, Paraflex shock absorbers, bidirectional winding via a Perpetual rotor, and an approximately 70-hour power reserve round out the movement's technical profile. Day and date displays appear in apertures with instantaneous, secure rapid-setting and a stop-seconds function for precise time adjustment.
