Early Races were largely timed by stopwatches mounted to motor vehicle dashboards, but as being the complication was shrunk, they have been additional frequently seen on wrists, particularly in the F1 and endurance racing heyday amongst the ’50s and ’70s. Inspired by British pilot’s watches from your seventies, Hamilton’s Khaki https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/