Getting Recognized the opportunity and progress from the earliest aviation pioneers, ZENITH provided a view to Louis Bleriot, writer of the 1st profitable flight throughout the English Channel. Lange & Söhne. I’ll explain why: the German model stepped on to the chronograph phase with their much-praised Datograph in 1999. View https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/