With The event with the ZENITH calibre, the Manufacture’s founder was nicely on his way to reach his star: The development of a dependable motion employing standardised creation methods. Declaring the winner from the race to make the first computerized chronograph in 1969 is contentious company, so Zenith’s “El Primero” https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/