Early Races ended up mostly timed by stopwatches mounted to motor vehicle dashboards, but as the complication was shrunk, they were extra typically found on wrists, especially in the F1 and endurance racing heyday between the ’50s and ’70s. The Speedmaster receives all of the like in Omega’s chronograph lineup, https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/