Reference 228349RBR-0046 presents the Day-Date 40 in a 40 mm Oyster case crafted from 18 kt white gold, featuring a monobloc middle case, screw-down case back, and a screw-down Twinlock winding crown for waterproofness to 100 metres. The bezel is set with diamonds, and a scratch-resistant sapphire crystal with a Cyclops lens over the date completes the case.
The white mother-of-pearl dial is itself set with diamonds, with hour positions marked by 10 baguette-cut diamonds, lending the watch a richly jeweled character. Instantaneous day and date displays appear in separate apertures, and a stop-seconds function allows for precise time setting.
Power comes from the Calibre 3255, a perpetual mechanical self-winding movement by Manufacture Rolex offering approximately 70 hours of power reserve and a precision rating of -2/+2 seconds per day after casing. The oscillator incorporates a paramagnetic blue Parachrom hairspring and Paraflex shock absorbers, and the movement holds Superlative Chronometer certification. The 18 kt white gold President bracelet closes with a concealed folding Crownclasp.
