In 1913, Blériot Recollects ZENITH’s precision with these phrases that he shared inside the manufacturer’s guestbook: “I'm quite satisfied with the ZENITH check out which I typically use And that i can't advocate it highly more than enough to individuals who care about accuracy”. Along with his colleague Thomas Earnshaw, https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/