At 28 mm, the Lady-Datejust 279163-0010 is built around an Oyster case rendered in Yellow Rolesor — Rolex's combination of Oystersteel and yellow gold. A domed bezel tops the case, while a screw-down case back and screw-down winding crown with Twinlock double waterproofness system provide water resistance to 100 metres. Scratch-resistant sapphire crystal with a Cyclops lens over the date completes the case profile.
The champagne-colour dial is marked with Roman numerals, lending the watch a classical character. Beneath it runs the Caliber 2236, a perpetual mechanical self-winding movement built by Rolex. It features a Syloxi silicon hairspring with patented geometry, Paraflex shock absorbers, bidirectional winding via a Perpetual rotor, and a power reserve of approximately 55 hours. Precision is rated at -2/+2 seconds per day after casing, meeting Superlative Chronometer standards through both COSC and Rolex certification.
The watch is worn on an Oyster bracelet in matching Yellow Rolesor, constructed from three-piece solid links and secured by a folding Oysterclasp with an Easylink 5 mm comfort extension link for easy on-wrist adjustment.
