Calibre 5 Isograph

Calibre 5 includes an Isograph-certified carbon-composite hairspring introduced in 2019. This component, named for the Greek word for 'equal,' provides stable movement and is produced in-house by TAG Heuer to enhance chronometer-certified performance through its antimagnetic, shock-resistant, and gravity-defying properties. Paired with an aluminium alloy balance wheel for thermal stability, it is based on the 25-jewel ETA 2824-2 or 26-jewel Sellita SW200. Additionals: Chronometer.