Down The road, Arnold’s chronometers would provide significant roles in legendary voyages, since the devices served navigators determine their longitude. Declaring the winner of your race to build the initial computerized chronograph in 1969 is contentious business, so Zenith’s “El Primero” moniker is arguable. That’s the name from the movement https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/