Reference 128349RBR-0017 presents the Day-Date in its 36mm format, housing an 18 kt white gold Oyster case with a monobloc middle, screw-down case back, and a Twinlock double waterproofness winding crown. The diamond-set bezel frames a scratch-resistant sapphire crystal fitted with a Cyclops lens over the date, while waterproofness extends to 100 metres / 330 feet.
The pink opal dial is itself set with diamonds, and the hour markers in 18 kt gold carry 32 diamonds, with the Roman VI and IX rendered in 18 kt gold and set with a further 24 diamonds. The diamond-set President bracelet in 18 kt white gold closes with a concealed folding Crownclasp, completing the fully jeweled presentation.
Power comes from the Calibre 3255, a perpetual mechanical self-winding movement certified as a Superlative Chronometer — meeting both COSC standards and Rolex's own post-casing certification for 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 a power reserve of approximately 70 hours round out the movement specification.
