Additional Proving its mastery of chronographs and especially large-frequency precision, ZENITH unveils the DEFY El Primero 21 that has a new El Primero calibre beating in a phenomenal rate of 50Hz for an accurate one/a centesimal of a second chronograph functionality. Perfect for individuals who price straightforwardness just as much https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/