Crafted entirely in 18 kt yellow gold, the Day-Date 40 (ref. 228238-0067) presents a 40 mm monobloc middle case with a screw-down case back and screw-down Twinlock winding crown, offering water resistance to 100 metres. The fluted bezel frames a scratch-resistant sapphire crystal fitted with a Cyclops lens over the date aperture.
The bright black dial features a Chromalight display with long-lasting blue luminescence for high legibility, while instantaneous day and date readouts appear in dedicated apertures with secure rapid-setting and a stop-seconds function for precise time adjustment. The 18 kt yellow gold President bracelet with semi-circular three-piece links fastens via a concealed folding Crownclasp.
At the heart of the watch beats the Calibre 3255, a perpetual mechanical self-winding movement from Manufacture Rolex. It incorporates a paramagnetic blue Parachrom hairspring, high-performance Paraflex shock absorbers, bidirectional winding via a Perpetual rotor, a power reserve of approximately 70 hours, and a precision rating of -2/+2 seconds per day after casing, backed by Superlative Chronometer certification.
