In A while, Arnold’s chronometers would provide essential roles in legendary voyages, because the instruments helped navigators calculate their longitude. Declaring the winner on the race to construct the first automated chronograph in 1969 is contentious enterprise, so Zenith’s “El Primero” moniker is arguable. That’s the title from the motion https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/