The 40mm 18K yellow gold Oyster case is built around a monobloc middle case with a solid screw-down case back and Triplock screw-down winding crown, delivering 100 meters of water resistance. A black Cerachrom bezel carries a moulded tachymetric scale, setting a bold frame around the turquoise dial. Chromalight hands and luminous index hour markers provide long-lasting blue luminescence for clear readability in low light.
The tri-register chronograph layout is controlled by screw-down pushers, with the small seconds, 30-minute counter, and 12-hour counter each occupying their own subdial. The Oysterflex band — constructed from high-performance elastomer over metal blades — fastens through a folding Oysterlock clasp with a Glidelock extension system that allows on-the-fly length adjustment. Scratch-resistant sapphire crystal covers the dial above.
Inside sits Rolex's Caliber 4131, a perpetual self-winding mechanical chronograph beating with a Parachrom hairspring and Paraflex shock absorbers. The movement offers a power reserve of approximately 72 hours and holds Superlative Chronometer certification — combining COSC testing with Rolex's own standards — for a precision rating of -2/+2 seconds per day.
