In 1913, Blériot Recollects ZENITH’s precision with these terms that he shared from the manufacturer’s guestbook: “I'm extremely happy with the ZENITH look at which I usually use and I can not advocate it remarkably more than enough to people who care about accuracy”. Lange & Söhne. I’ll make clear https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/