Reference 128239-0064 presents the Day-Date 36 in an 18 kt white gold Oyster case measuring 36 mm across. A fluted bezel frames the blue ombré dial dressed in Roman numerals, while a scratch-resistant sapphire crystal with Cyclops lens over the date window keeps the display legible at a glance. The monobloc middle case is paired with a screw-down case back and a screw-down Twinlock winding crown, providing waterproofness to 100 metres.
On the wrist, the watch is carried by an 18 kt white gold diamond-set President bracelet secured by a concealed folding Crownclasp. Inside, the COSC-certified Calibre 3255 — a perpetual, mechanical, self-winding movement manufactured by Rolex — delivers a precision rating of -2/+2 seconds per day after casing. Bidirectional winding via a Perpetual rotor builds a power reserve of approximately 70 hours, while a paramagnetic blue Parachrom hairspring and Paraflex shock absorbers contribute to the movement's reliability.
Day and date indications appear in separate apertures with instantaneous, rapid-setting functionality, and a stop-seconds mechanism allows for exact time setting. Production year is noted as 2024.
