Additional Proving its mastery of chronographs and especially substantial-frequency precision, ZENITH unveils the DEFY El Primero 21 by using a new El Primero calibre beating at a phenomenal amount of 50Hz for an exact one/a centesimal of the next chronograph purpose. It partnered With all the Neuchâtel Tourism Place of https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/