ZENITH Solidifies its Worldwide track record as the primary manufacturer of precision chronometers and devices across lots of domains. The 3rd large action happened in the early 1900’s. The form of your timekeeping equipment altered in favor in the wristwatch. The main chronometer wristwatch motion arrived in about 1910, and https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/