Zenith watches | Chrono24.com
Zenith: Ahead of the Curve. The Swiss luxury watch manufacturer Zenith is inseparable from their famous chronograph caliber, the El Primero. This movement was released as 3019 PHC in 1969 and was the first automatic chronograph movement ever produced. Thanks to a balance frequency of 36,000 A/h, it can measure 1/10th of a second.
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