Early Races were mostly timed by stopwatches mounted to vehicle dashboards, but as being the complication was shrunk, they were being more often found on wrists, particularly in the F1 and endurance racing heyday amongst the ’50s and ’70s. The expression “chronometer” took on a rather broader meaning as personalized, https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/