Early Races were primarily timed by stopwatches mounted to car or truck dashboards, but given that the complication was shrunk, they have been additional generally noticed on wrists, especially 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/