At 28mm, the Lady-Datejust reference 279171-0025 is built around a round Oyster case crafted in Everose Rolesor, Rolex's own combination of Oystersteel and Everose gold. The monobloc middle case is sealed by a solid screw-down case back and a screw-down Twinlock winding crown, delivering water resistance to 100 metres. Scratch-resistant sapphire crystal with a Cyclops lens over the date completes the case.
The rosé-colour dial is dressed with Roman numeral indices, offering a classically feminine aesthetic. The fixed bezel frames the dial cleanly, while the Jubilee bracelet — constructed from five-piece links in matching Everose Rolesor — fastens with a concealed folding Crownclasp.
Inside runs Rolex Calibre 2236, a perpetual, mechanical, self-winding movement rated as a Superlative Chronometer, reflecting both COSC certification and Rolex's own post-casing standards for a precision of -2/+2 seconds per day. A Syloxi silicon hairspring with patented geometry, Paraflex shock absorbers, and bidirectional winding via a Perpetual rotor contribute to an approximately 55-hour power reserve.
