Zenith Chronomaster Sport, equipped with El Primero 3600 movement The new Chronomaster Sport chronograph brings a series of technical updates to the El Primero movement. The El Primero 400 movement is out of fashion, but wonderful. In 1969, Seiko introduced the first self-winding chronograph movement (used with Seiko 6309 and Breitling/Breitling/Bourne Caliber 01), and it continues to this day. However, the design of the movement is also a relic of its era-for example, there are many screws of different sizes, more than the movement you design today, which makes manufacturing time, labor and cost higher. The Chronomaster Sport launched by Zenith today uses a new movement: caliber 3600, designed to…