Crafted entirely in 18kt yellow gold, the 28mm round case of this Lady-Datejust follows Rolex's Oyster architecture: a monobloc middle case paired with a screw-down case back and a screw-down Twinlock winding crown for waterproofness to 100 metres. Overhead, scratch-resistant sapphire crystal with a Cyclops lens magnifies the date, while the bezel is set with 44 brilliant-cut diamonds.
The champagne-colour dial is itself set with diamonds mounted in 18kt gold settings, complemented by centre hour, minute, and seconds hands along with an instantaneous date and stop-seconds function for precise setting. Power comes from Rolex's self-winding Calibre 2236, a perpetual mechanical movement with a Syloxi silicon hairspring, Paraflex shock absorbers, bidirectional winding via a Perpetual rotor, and a power reserve of approximately 55 hours. The movement is COSC certified and achieves a precision of -2/+2 seconds per day after casing.
The watch rides on an 18kt yellow gold President bracelet featuring semi-circular three-piece links and secured by a concealed folding Crownclasp. Reference 279138RBR-0023 brings together the Lady-Datejust 28's signature proportions with an all-gold, diamond-set specification.
