Crafted in platinum, this 40 mm Day-Date 40 houses an Oyster case built around a monobloc middle case with a screw-down case back and winding crown. The bezel is set with diamonds, while the scratch-resistant sapphire crystal carries a Cyclops lens over the date window. A Twinlock double waterproofness system on the crown and water resistance to 100 metres / 330 feet complete the case construction.
The bright black dial is itself set with diamonds, with hour positions marked by 10 baguette-cut diamonds. Instantaneous day and date displays appear in apertures, and a stop-seconds function allows precise time setting. The platinum President bracelet with semi-circular three-piece links fastens via a concealed folding Crownclasp.
Power comes from the Calibre 3255 perpetual, mechanical, self-winding movement — a Manufacture Rolex calibre carrying Superlative Chronometer certification, reflecting COSC testing plus Rolex's own certification after casing, with a precision rating of -2/+2 seconds per day. A paramagnetic blue Parachrom hairspring, high-performance Paraflex shock absorbers, and bidirectional self-winding via a Perpetual rotor deliver an approximately 70-hour power reserve.
