In 1913, Blériot Recalls ZENITH’s precision with these terms that he shared while in the model’s guestbook: “I'm really happy with the ZENITH view which I usually use and I are unable to suggest it highly ample to individuals that care about precision”. Lange & Söhne. I’ll make clear why: https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/