This is the watch chosen by TAG Heuer to debut its newest groundbreaking invention: a balance spring in an ultra-light, low-density carbon composite that is totally anti-magnetic, makes perfectly concentric oscillations and is highly shock-resistant. The result is a tourbillon Chronograph movement inside a 45mm black PVD titanium case with a carbon bezel. This new balance spring is the latest TAG Heuer technology to rethink the fundamental principles of a mechanical timepiece and, at the same time, enhance the timekeeping performance of the watches equipped with this COSC-certified chronometer movement.