At 28 mm, the Lady-Datejust ref. 279174-0011 is built around an Oyster case crafted from White Rolesor — a combination of Oystersteel and white gold. A fluted white gold bezel frames the dark grey dial, which features a Chromalight display with long-lasting blue luminescence and a scratch-resistant sapphire crystal fitted with a Cyclops lens over the date. The screw-down winding crown employs a Twinlock double waterproofness system, and the case is waterproof to 100 metres / 330 feet.
The Oystersteel Jubilee bracelet is composed of five-piece links and secured by a concealed folding Crownclasp, lending the watch its characteristic refined character on the wrist.
Power comes from the Caliber 2236, a perpetual mechanical self-winding movement manufactured by Rolex. It operates with a Syloxi silicon hairspring featuring 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, and the movement carries Superlative Chronometer certification — combining COSC testing with Rolex's own post-casing standards.
