Early Races have been generally timed by stopwatches mounted to car or truck dashboards, but given that the complication was shrunk, they had been extra typically viewed on wrists, especially in the F1 and endurance racing heyday amongst the ’50s and ’70s. Encouraged by British pilot’s watches from your 1970s, https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/