Early Races had been largely timed by stopwatches mounted to motor vehicle dashboards, but as the complication was shrunk, they ended up a lot more generally seen on wrists, especially in the F1 and endurance racing heyday between the ’50s and ’70s. I'd Fortunately use Watches World yet again and https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/