Down The road, Arnold’s chronometers would serve important roles in famous voyages, as being the instruments served navigators work out their longitude. Declaring the winner with the race to construct the first automated chronograph in 1969 is contentious business enterprise, so Zenith’s “El Primero” moniker is arguable. That’s the name https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/