One Of several chronograph’s earliest works by using was timing horse races, so The natural way, the complication developed when horses built way for horsepower. Declaring the winner from the race to create the main automatic chronograph in 1969 is contentious enterprise, so Zenith’s “El Primero” moniker is arguable. That’s https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/