With The development with the ZENITH calibre, the Manufacture’s founder was effectively on his way to reach his star: The creation of a dependable motion using standardised production strategies. Declaring the winner of the race to construct the 1st computerized chronograph in 1969 is contentious enterprise, so Zenith’s “El Primero” https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/