In 1913, Blériot Recollects ZENITH’s precision Using these phrases that he shared in the brand’s guestbook: “I'm incredibly happy with the ZENITH watch which I commonly use And that i can't recommend it extremely sufficient to individuals that care about accuracy”. Tissot traces its extended background back again to 1853, https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/