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