How often do you need to measure an exact time interval? It’s actually more frequently than you think: tracking bike rides, runs, exercise routines or cooking times, or to tell your kid to turn off the TV in five minutes. But how exactly does a chronograph work? And what types of chronographs are there? This is IWC Watchmaker Sabrina Herzog’s field of expertise and she clarifies the differences between the basic, the double, and the flyback chronograph. #IWCWatches