Reference 128239-0069 presents the Day-Date 36 in a 36 mm Oyster case crafted from 18 kt white gold, featuring a fluted bezel and a solid case back. The screw-down winding crown employs a Twinlock double waterproofness system, and the scratch-resistant sapphire crystal includes a Cyclops lens over the date, with water resistance to 100 metres / 330 feet.
The bright blue dial is set with diamonds — 10 baguette-cut stones serving as hour markers — creating a striking interplay of color and light. The 18 kt white gold President bracelet with semi-circular three-piece links closes via a concealed folding Crownclasp, completing the all-white-gold composition.
Powering the watch is the Rolex Calibre 3255, a perpetual mechanical self-winding movement with a precision rating of -2/+2 seconds per day after casing and a power reserve of approximately 70 hours. The oscillator features a paramagnetic blue Parachrom hairspring and high-performance Paraflex shock absorbers, and the movement is COSC certified. Functions include centre hour, minute, and seconds hands alongside instantaneous day and date displays with secure rapid-setting and stop-seconds for precise time adjustment.
