Reference 228348RBR-0046 presents the Day-Date 40 in its most opulent form: a 40 mm monobloc case crafted from 18 kt yellow gold, sealed by a screw-down case back and a Twinlock double waterproofness winding crown, and protected by scratch-resistant sapphire crystal with a Cyclops lens over the date. The bezel is fully set with diamonds, and water resistance extends to 100 metres / 330 feet.
The white mother-of-pearl dial is itself set with diamonds and marked by 10 baguette-cut diamond hour indicators, lending the piece an exceptional level of gem-setting throughout. Day and date are displayed instantaneously through apertures with secure rapid-setting, while a stop-seconds function allows for precise time adjustment.
Powering the watch is the Calibre 3255 Manufacture Rolex movement — a perpetual, mechanical, self-winding calibre featuring a paramagnetic blue Parachrom hairspring, high-performance Paraflex shock absorbers, bidirectional winding via Perpetual rotor, and approximately 70 hours of power reserve. The movement holds Superlative Chronometer certification, reflecting a precision rating of -2/+2 seconds per day after casing. The 18 kt yellow gold President bracelet closes with a concealed folding Crownclasp.
