At 28mm, the Oyster case of this Lady-Datejust is built from 18kt Everose gold with a monobloc middle case, screw-down case back, and a screw-down Twinlock winding crown that keeps the watch waterproof to 100 metres. A scratch-resistant sapphire crystal with a Cyclops lens over the date window sits above the remarkable dial, which is entirely paved with 291 diamonds and marked with Roman numerals. The fluted bezel completes the exterior with characteristic Rolex refinement.
The President bracelet, also in 18kt Everose gold, features semi-circular three-piece links and fastens with a concealed folding Crownclasp. Inside, Rolex Calibre 2236 — a perpetual, mechanical, self-winding movement — delivers a precision of -2/+2 seconds per day after casing and a power reserve of approximately 55 hours. The movement features a Syloxi silicon hairspring with patented geometry and high-performance Paraflex shock absorbers, and carries Superlative Chronometer certification reflecting both COSC and Rolex standards post-casing.
Functions include centre hour, minute, and seconds hands, an instantaneous date with rapid setting, and stop-seconds for precise time adjustment. Bidirectional winding is accomplished via the Perpetual rotor, ensuring reliable performance in everyday wear. Reference 279175-0023 represents the Lady-Datejust in one of its most jewel-forward expressions.
