Reference 128235-0051 presents the Day-Date 36 in a 36 mm Oyster case crafted from 18 kt Everose gold, finished with a fluted bezel. The screw-down winding crown employs Rolex's Twinlock double waterproofness system, and the scratch-resistant sapphire crystal carries a Cyclops lens over the date window. Water resistance extends to 100 metres / 330 feet.
The slate dial is set with diamonds in 18 kt gold settings, while baguette-cut diamonds appear at 6 and 9 o'clock, lending the face a distinctive geometric accent. Day and date displays occupy dedicated apertures with secure rapid-setting, and a stop-seconds function allows for precise time adjustment.
Power comes from the Calibre 3255, a perpetual mechanical self-winding movement certified as a Superlative Chronometer to a precision of -2/+2 seconds per day after casing. A paramagnetic blue Parachrom hairspring and Paraflex shock absorbers make up the oscillator assembly, and the bidirectional Perpetual rotor delivers a power reserve of approximately 70 hours. The diamond-set President bracelet in 18 kt Everose gold closes with a concealed folding Crownclasp.
