Additional Proving its mastery of chronographs and exclusively higher-frequency precision, ZENITH unveils the DEFY El Primero 21 using a new El Primero calibre beating in a phenomenal price of 50Hz for an correct one/100th of a next chronograph operate. Declaring the winner of your race to create the initial computerized https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/