Early Races were being largely timed by stopwatches mounted to automobile dashboards, but because the complication was shrunk, they have been a lot more typically found on wrists, specifically in the F1 and endurance racing heyday among the ’50s and ’70s. Chronographs — with their bezels, scales and sub-dials — https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/