In 1913, Blériot Recalls ZENITH’s precision with these terms that he shared from the manufacturer’s guestbook: “I'm incredibly pleased with the ZENITH watch which I typically use and I can't endorse it extremely sufficient to those who treatment about accuracy”. Pierre Jaquet-Droz (1721-1790), founder of the modern watchmaking home that https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/