In 1913, Blériot Recollects ZENITH’s precision Using these phrases that he shared during the manufacturer’s guestbook: “I'm incredibly pleased with the ZENITH watch which I generally use and I are not able to propose it hugely ample to individuals who treatment about precision”. six miles, or fifty five.seven km) at https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/