Measuring 40 mm, the 18 kt yellow gold case is constructed with a monobloc middle, screw-down case back, and a screw-down Triplock winding crown that delivers waterproofness to 100 metres / 330 feet. The lugs are set with diamonds, and the bezel is fully diamond-set, while a scratch-resistant sapphire crystal protects the dial beneath.
That golden dial is richly appointed: eight baguette-cut diamond-set hour markers encircle the chapter ring, three additional diamond-set markers appear at 3, 6, and 9 o'clock, and the subsidiary chronograph counters feature bright black rings also set with diamonds. The Oysterflex bracelet — constructed from flexible metal blades overmoulded with high-performance elastomer — secures via a folding Oysterlock safety clasp with the Rolex Glidelock extension system.
Power comes from the Calibre 4131, a perpetual, mechanical, self-winding chronograph movement certified as a Superlative Chronometer to a precision of -2/+2 seconds per day after casing. A paramagnetic blue Parachrom hairspring and high-performance Paraflex shock absorbers contribute to its resilience, while bidirectional winding via the Perpetual rotor provides a power reserve of approximately 72 hours.
