Additional Proving its mastery of chronographs and exclusively higher-frequency precision, ZENITH unveils the DEFY El Primero 21 with a new El Primero calibre beating at a phenomenal fee of 50Hz for an correct one/100th of the 2nd chronograph purpose. It was our pleasure to assist you in obtaining your new https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/