In 1913, Blériot Recollects ZENITH’s precision with these words that he shared inside the brand name’s guestbook: “I'm extremely pleased with the ZENITH watch which I ordinarily use And that i are not able to advise it very adequate to folks who care about precision”. six miles, or fifty five.7 https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/