Crafted entirely in 18kt yellow gold, the 28mm Oyster case houses a scratch-resistant sapphire crystal with a Cyclops lens over the date. The bezel is set with 44 brilliant-cut diamonds, while the silver dial carries index gem-setting for a quietly luminous finish. A screw-down case back, screw-down winding crown with Twinlock double waterproofness system, and monobloc middle case construction provide water resistance to 100 metres / 330 feet.
Inside beats the Rolex Calibre 2236 — a perpetual, mechanical, self-winding movement built by Manufacture 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, and the movement is COSC certified. Functions include centre hour, minute, and seconds hands, an instantaneous date with rapid setting, and stop-seconds for precise time setting.
The President bracelet in 18kt yellow gold completes the piece, constructed from semi-circular three-piece links and secured by a concealed folding Crownclasp. Reference 279138RBR-0005 represents the Lady-Datejust 28 in one of its most enduring configurations.
