Early Races were being mainly timed by stopwatches mounted to car dashboards, but since the complication was shrunk, they have been much more generally found on wrists, specifically in the F1 and endurance racing heyday in between the ’50s and ’70s. Equipment Patrol editors chose the Blancpain Air Command between https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/