The first references of the Zenith El Primero were launched in 1969, which featured the El Primero caliber. This movement is regarded as one of the most accurate automatic chronographs. To browse the full selection of models visit the used Zenith watches for sale page.
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The Zenith El Primero was produced in 1969 and compared to movements like the ETA's Valjoux 7750 for example. This model promises a longer lasting power reserve of 50 hours.