Early Races were mostly timed by stopwatches mounted to automobile dashboards, but because the complication was shrunk, they ended up a lot more normally seen on wrists, especially in the F1 and endurance racing heyday involving the ’50s and ’70s. Chopard's Mille Miglia collection celebrates the world's most stunning race. https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/