But the movement has also been updated in the frame of continuous optimization, in particular, by incorporating modern technologies to evolve in synchrony with the times. The re-industrialisation of the movement in 1987 (under the reference Calibre 400) was the occasion to introduce several improvements. In more than 50 years of history, the El Primero has evolved in many directions. Beyond its historical importance, El Primero’s longevity speaks for itself. Part of the trilogy of automatic chronograph movements that hit the market in 1969, it is the only one that is still produced to date. Presented in 1969, the Zenith El Primero has become an undisputed horological icon. Meet the new Zenith Chronomaster Sport, and don’t miss our video review above to see how it looks on the wrist. As 2021 kicks off, Zenith unveils a new sporty and technical iteration of the collection with a sharp new look outside and a significant boost inside. Today, it is the most emblematic expression of the iconic El Primero movement. More than 20 years later, this sports chronograph has become one of the brand’s key collections. The Zenith Chronomaster has spawned numerous versions and generations since it was originally presented at the 1994 Basel watch fair.

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