Measuring 40 mm across, the case is crafted from 18 kt Everose gold with a monobloc middle case, screw-down case back, and a screw-down Triplock winding crown offering water resistance to 100 metres. A black monobloc Cerachrom bezel in ceramic carries a moulded tachymetric scale, while the scratch-resistant sapphire crystal protects the bright black and sundust dial beneath, which features a Chromalight display with long-lasting blue luminescence.
Power comes from the Calibre 4131, a perpetual mechanical self-winding chronograph movement of Rolex manufacture. It delivers a precision of -2/+2 seconds per day after casing, holds a power reserve of approximately 72 hours via bidirectional winding through a Perpetual rotor, and relies on a paramagnetic blue Parachrom hairspring alongside Paraflex shock absorbers. The movement carries Superlative Chronometer certification, reflecting both COSC and Rolex certification after casing.
The Oysterflex strap is constructed from flexible metal blades overmoulded with high-performance elastomer and secures with a folding Oysterlock safety clasp incorporating the Rolex Glidelock extension system for a precise and comfortable fit.
