Reference 128399TBR-0021 houses the 36 mm Oyster case in 18 kt white gold, featuring a monobloc middle case, screw-down case back, and a screw-down Twinlock winding crown for waterproofness 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 blue ombré dial displays Roman numeral hour markers and pairs beautifully with the 18 kt white gold President bracelet, composed of semi-circular three-piece links and secured by a concealed folding Crownclasp.
Power comes from the Calibre 3255 perpetual, mechanical, self-winding movement — a Manufacture Rolex calibre certified as a Superlative Chronometer (COSC plus Rolex certification after casing) with a precision of -2/+2 seconds per day. A paramagnetic blue Parachrom hairspring, high-performance Paraflex shock absorbers, bidirectional winding via a Perpetual rotor, and an approximately 70-hour power reserve round out the movement specifications.
