El Primero Zenith Heritage Pilot Ton-upZenith is one of those brands you can hardly go wrong with. Whether it is vintage or a watch from their modern collection, there is plenty to choose from. How come? Simple. The El Primero movement. It was one of the first automatic chronograph movements on the market in 1969. A strong competition was going on back in the day between Seiko, Zenith and a joint-venture of Breitling, B 1ren and Heuer. All three companies came up with a new self-winding chronograph movement. More than 50 years later, the Zenith El Primero is the last one standing from those three firsts. The Zenith El Primero movement is still in production and also being used in the new Ze...