In 1913, Blériot Recollects ZENITH’s precision Using these terms that he shared from the brand’s guestbook: “I'm quite happy with the ZENITH watch which I commonly use And that i can't endorse it highly ample to people who care about accuracy”. Pierre Jaquet-Droz (1721-1790), founding father of the trendy watchmaking https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/