Measuring 31mm, the 18kt white gold case is built on Rolex's Oyster architecture, featuring a monobloc middle case, screw-down case back, and a screw-down winding crown with Twinlock double waterproofness — delivering water resistance to 100 metres. The bezel is set with diamonds, while a scratch-resistant sapphire crystal with a Cyclops lens over the date completes the case.
The pink dial features a Chromalight display with long-lasting blue luminescence for strong legibility. Power comes from Rolex Calibre 2236, a perpetual mechanical self-winding movement certified as a Superlative Chronometer — meeting both COSC standards and Rolex's own post-casing certification — offering a precision of -2/+2 seconds per day and approximately 55 hours of power reserve. The oscillator employs a Syloxi silicon hairspring with patented geometry alongside Paraflex shock absorbers.
The watch rides on an 18kt white gold President bracelet with semi-circular three-piece links, secured by a concealed folding Crownclasp. Reference 278289RBR-0013 represents the Datejust 31 in one of its most distinctive configurations.
