Additional Proving its mastery of chronographs and especially high-frequency precision, ZENITH unveils the DEFY El Primero 21 with a new El Primero calibre beating in a phenomenal rate of 50Hz for an accurate 1/one centesimal of a second chronograph operate. It partnered While using the Neuchâtel Tourism Business to develop https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/