Reference 128348RBR-0047 presents the Day-Date 36 in a 36 mm Oyster case crafted from 18 kt yellow gold, featuring a monobloc middle case, screw-down case back, and a Twinlock double waterproofness winding crown. The bezel is set with diamonds, while scratch-resistant sapphire crystal with a Cyclops lens over the date completes the case. Water resistance reaches 100 metres / 330 feet.
The white dial displays the day and date in separate apertures with instantaneous, rapid-setting corrections. Hour, minute, and seconds hands work alongside a stop-seconds function for precise time setting. The 18 kt yellow gold President bracelet — built from semi-circular three-piece links — fastens with a concealed folding Crownclasp.
Powering the watch is the Calibre 3255, a perpetual mechanical self-winding movement with bidirectional winding via a Perpetual rotor. It carries a precision rating of -2/+2 seconds per day after casing, a paramagnetic blue Parachrom hairspring, Paraflex shock absorbers, and a power reserve of approximately 70 hours. The movement holds Superlative Chronometer certification, combining COSC testing with Rolex's own certification after casing.
