Housed in a 36 mm 18 kt white gold Oyster case featuring a monobloc middle case, screw-down case back, and a screw-down Twinlock winding crown, this Day-Date reference 128399TBR-0001 is waterproof to 100 metres. The bezel is set with diamonds, while scratch-resistant sapphire crystal with a Cyclops lens over the date completes the case.
The silver dial carries index hour markers and presents the day and date in two apertures with Rolex's secure rapid-setting mechanism. The 18 kt white gold President bracelet — composed of semi-circular three-piece links — fastens via a concealed folding Crownclasp for a seamless look on the wrist.
Power comes from the Calibre 3255 perpetual, mechanical, self-winding movement, offering approximately 70 hours of power reserve and a precision rating of -2/+2 seconds per day after casing. The oscillator features a paramagnetic blue Parachrom hairspring and high-performance Paraflex shock absorbers, and the watch carries Superlative Chronometer certification reflecting both COSC and Rolex's own post-casing standards.
