Sized at 28 mm, the Lady-Datejust ref. 279163-0024 is built around an Oyster case crafted in Yellow Rolesor, Rolex's combination of Oystersteel and yellow gold. A domed bezel crowns the case, while a screw-down winding crown with Twinlock double waterproofness and a monobloc middle case construction deliver water resistance to 100 metres / 330 feet. Scratch-resistant sapphire crystal with a Cyclops lens over the date completes the case.
The white dial is dressed with Roman numeral hour markers, offering a classically legible face. The three-piece solid-link Oyster bracelet is rendered in matching Yellow Rolesor and secured by a folding Oysterclasp with an Easylink 5 mm comfort extension link.
Inside beats the Rolex Caliber 2236, a perpetual, mechanical, self-winding movement with a Syloxi silicon hairspring and Paraflex shock absorbers. It delivers bidirectional winding via a Perpetual rotor, approximately 55 hours of power reserve, and a precision rating of -2/+2 seconds per day after casing. The caliber carries Superlative Chronometer certification — COSC testing followed by Rolex certification after casing.
