Early Races have been generally timed by stopwatches mounted to vehicle dashboards, but because the complication was shrunk, they were being extra often 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 through the Manufacture, https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/