FUNCTIONS & FEATURES ANTI-SCRATCH SAPPHIRE CRYSTAL WITH DOUBLE ANTI-REFLECTION TREATMENT POLISHED FACETED HANDS AND INDEXES ARE HAND APPLIED AND COATED WITH LUMINESCENT MATERIAL for enhanced visibility SAFETY PUSH-BUTTON ON THE BRACELET OR STRAP for comfortable use, prevents accidental opening C.O.S.C CHRONOMETER for ultimate precision certified by the Swiss Office of Chronometry AUTOMATIC CHRONOGRAPH MOVEMENT TACHYMETER SCALE ON BEZEL for average speed measurement The tachymeter indicates the average speed of a car, for example, by measuring the time taken to cover a given distance (a kilometer or a mile). WATER RESISTANT TO 100 Mensured by rigorous manufacturing standards and strict testing. OVERSIZED SCREW-IN CROWN Easy-to-hold and with 2 security gaskets reliable to 100 m. LARGE DATE DISPLAY AT 6 O'CLOCKDOUBLE SAPPHIRE CRYSTAL CASEBACK fitted with six screws reveals movement PERMANENT SECONDS AT 3 appears in a Rotating System decorated with "Côtes de Genève"EXCLUSIVE TAG HEUER ROTATING SYSTEM with "Côtes de Genève" finish MOVEMENT DESCRIPTION TAG Heuer Calibre 17 RS , Swiss Made. Automatic calibre. Diameter: 28.6 mm (12 ½''') — 37 rubies. Rapid date correction. PERFORMANCE Balance frequency: 28,800 vibrations per hour (4 Hz). Power reserve: about 42 hours. CERTIFICATION C.O.S.C. certified chronograph. DISPLAY Hours — minutes — small seconds at 3 o'clock. Chronograph minutes at 9 o'clock displayed by ROTATING SYSTEM. Chronograph central seconds. DECORATION Openworked oscillating mass: "Côtes de Genève" engraved "TAG Heuer — Calibre 17 — Chronometer Swiss Made".