In 1913, Blériot Remembers ZENITH’s precision Using these words that he shared from the manufacturer’s guestbook: “I'm extremely happy with the ZENITH view which I normally use And that i are unable to endorse it very ample to people who care about accuracy”. James L. January 14, 2023 The explanation https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/