ZENITH Solidifies its international reputation as being the main manufacturer of precision chronometers and instruments across a lot of domains. The 3rd major step happened during the early 1900’s. The shape with the timekeeping apparatus adjusted in favor of your wristwatch. The first chronometer wristwatch motion came in about 1910, https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/
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