ZENITH Solidifies its Worldwide reputation because the major manufacturer of precision chronometers and devices throughout numerous domains. The 3rd big move took place while in the early 1900’s. The shape in the timekeeping apparatus changed in favor of the wristwatch. The 1st chronometer wristwatch movement arrived in about 1910, and https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/