At 28mm, the Lady-Datejust ref. 279174-0006 is built around an Oyster case constructed from White Rolesor, Rolex's combination of Oystersteel and white gold. A screw-down winding crown featuring the Twinlock double waterproofness system, along with a monobloc middle case and screw-down case back, delivers water resistance to 100 metres. The fluted bezel and scratch-resistant sapphire crystal — fitted with a Cyclops lens over the date aperture — complete the case architecture.
The silver dial features a Chromalight display with long-lasting blue luminescence for reliable legibility. An Oystersteel Oyster bracelet composed of three-piece solid links secures via a folding Oysterclasp equipped with an Easylink 5mm comfort extension link.
Power comes from the Caliber 2236, a perpetual mechanical self-winding movement from Manufacture Rolex. Its Syloxi silicon hairspring with patented geometry and Paraflex shock absorbers support a precision rating of -2/+2 seconds per day after casing, a roughly 55-hour power reserve, and Superlative Chronometer certification reflecting both COSC and Rolex's own post-casing standards.
