One Of many chronograph’s earliest takes advantage of was timing horse races, so By natural means, the complication evolved when horses made way for horsepower. Declaring the winner on the race to make the main automatic chronograph in 1969 is contentious business, so Zenith’s “El Primero” moniker is arguable. That’s https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/