Early Races ended up typically timed by stopwatches mounted to vehicle dashboards, but as being the complication was shrunk, they ended up more frequently witnessed on wrists, specifically in the F1 and endurance racing heyday concerning the ’50s and ’70s. The Speedmaster receives many of the like in Omega’s chronograph https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/