Early Races were primarily timed by stopwatches mounted to motor vehicle dashboards, but as being the complication was shrunk, they were being additional often found on wrists, specifically in the F1 and endurance racing heyday in between the ’50s and ’70s. Chronographs — with their bezels, scales and sub-dials — https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/