In 1913, Blériot Recollects ZENITH’s precision Using these phrases that he shared within the model’s guestbook: “I am extremely happy with the ZENITH watch which I normally use and I can't propose it highly adequate to people who care about accuracy”. ZENITH launches the a hundred thirty five-Observatoire limited edition, https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/