Zenith El-Primero Covergirl Chronograph ref. A3818Zenith was founded in 1865 in Le Locle, Switzerland, by Georges Favre Jacotwho was just 22 years old at the time. His vision was revolutionary: he sought to unite all aspects of watchmaking under one roof, creating one of the very first true manufacture style factories. This integrated approach enabled Zenith to maintain exceptional precision and quality control, forming the foundation of the brands enduring reputation. From its earliest days, Zenith