Early Races had been largely timed by stopwatches mounted to motor vehicle dashboards, but as the complication was shrunk, they have been far more normally seen on wrists, specifically in the F1 and endurance racing heyday involving the ’50s and ’70s. Chronographs — with their bezels, scales and sub-dials — https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/