Even Further proving its mastery of chronographs and particularly superior-frequency precision, ZENITH unveils the DEFY El Primero 21 which has a new El Primero calibre beating at a phenomenal amount of 50Hz for an precise 1/100th of a next chronograph perform. Thank you all over again for selecting Watches World! https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/
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