Down The road, Arnold’s chronometers would serve essential roles in legendary voyages, as the devices assisted navigators work out their longitude. Declaring the winner on the race to make the initial automatic chronograph in 1969 is contentious company, so Zenith’s “El Primero” moniker is arguable. That’s the title on the https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/