Early Races had been primarily timed by stopwatches mounted to auto dashboards, but because the complication was shrunk, they were more typically noticed on wrists, especially in the F1 and endurance racing heyday among the ’50s and ’70s. The phrase “chronometer” took on a rather broader meaning as personal, portable https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/