More Proving its mastery of chronographs and specially higher-frequency precision, ZENITH unveils the DEFY El Primero 21 with a new El Primero calibre beating at a phenomenal price of 50Hz for an correct one/one hundredth of the next chronograph perform. Even though black-coated instances are inclined to look scaled-down on https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/