Early Races have been generally timed by stopwatches mounted to auto dashboards, but because the complication was shrunk, they were being much more often noticed on wrists, especially in the F1 and endurance racing heyday in between the ’50s and ’70s. Encouraged by British pilot’s watches from the seventies, Hamilton’s https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/