Early Races were largely timed by stopwatches mounted to car dashboards, but because the complication was shrunk, they were much more normally observed on wrists, particularly in the F1 and endurance racing heyday in between the ’50s and ’70s. This was the results of intense R&D via the Manufacture, which https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/