Additional Proving its mastery of chronographs and specifically significant-frequency precision, ZENITH unveils the DEFY El Primero 21 with a new El Primero calibre beating in a phenomenal price of 50Hz for an correct one/a centesimal of a next chronograph purpose. To advertise the art of watchmaking to as Lots of https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/