Case: Diameter: 40 mm. Stainless steel. Fixed bezel with engraved tachymetric scale. Monobloc middle case. Screw-down case back and winding crown. Triplock triple waterproofness system. Waterproof to 100 metres / 330 feet.

Dial: Black. Scratch-resistant sapphire. The central sweep seconds hand allows an accurate reading of 1/8 second, while the two counters on the dial display the lapsed time in hours and minutes.

Movement: Perpetual, mechanical chronograph, self-winding. Calibre 4130, manufacture Rolex. Precision of -2/+2 sec/day, after casing. Centre hour, minute and seconds hands, small seconds hand at 6 o'clock. Chronograph (centre hand) accurate to within 1/8 of a second, 30-minute counter at 3 o'clock and 12-hour counter at 9 o'clock. Stop-seconds for precise time setting. Paramagnetic blue parachrom hairspring. Bidirectional self-winding via perpetual rotor. Power reserve of 72 hours. 44 jewels. Frequency: 28.800 vph.

Bracelet: Stainless steel. Oyster, flat three-piece links. Folding oysterlock safety clasp with easylink 5 mm comfort extension link.