Reference 128238-0123 houses a 36 mm round case crafted entirely in 18K yellow gold, featuring a fluted bezel and a solid case back. 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.
At the heart of the dial, white mother-of-pearl is set with 10 baguette-cut diamonds in place of hour markers, while instantaneous day and date displays appear in dedicated apertures. Power comes from Calibre 3255, a perpetual mechanical self-winding movement bearing Manufacture Rolex origin, rated to a precision of -2/+2 seconds per day after casing and certified as a Superlative Chronometer. A paramagnetic blue Parachrom hairspring and Paraflex shock absorbers provide additional resilience, and the bidirectional Perpetual rotor delivers a power reserve of approximately 70 hours.
The 18K yellow gold President bracelet, composed of semi-circular three-piece links, fastens with a concealed folding Crownclasp, completing this Day-Date 36 in a cohesive all-gold execution.
