Afterward, Arnold’s Chronometers would serve important roles in famous voyages, as the devices aided navigators work out their longitude. Declaring the winner with the race to make the primary computerized chronograph in 1969 is contentious enterprise, so Zenith’s “El Primero” moniker is arguable. That’s the name of your movement inside https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/