Reference 128399TBR-0009 presents the Day-Date in a 36mm monobloc 18 kt white gold case featuring a screw-down case back, screw-down Twinlock winding crown, and scratch-resistant sapphire crystal with a Cyclops lens over the date. The bezel is fully set with diamonds, and water resistance is rated to 100 metres / 330 feet.
At the heart of the watch is a pink opal dial set with diamonds, where the hour markers in 18 kt gold carry 32 diamonds and the Roman VI and IX numerals in 18 kt gold are set with an additional 24 diamonds. The President bracelet in 18 kt white gold closes via a concealed folding Crownclasp.
Power comes from the Calibre 3255, a perpetual mechanical self-winding movement certified as a Superlative Chronometer to a precision of -2/+2 seconds per day after casing. It offers approximately 70 hours of power reserve, bidirectional winding via a Perpetual rotor, and an oscillator equipped with a paramagnetic blue Parachrom hairspring and Paraflex shock absorbers.
