Throwback Thursday: Zenith El Primero Sets the Bar on High Frequency

The El Primero is actually a movement rather than a particular model. In 1969, in the race to create the first automatic chronograph, only Zenith succeeded in designing a fully integrated movement, based around a column wheel. Noted for its high-frequency oscillations (and therefore greater accuracy), the 36,000 VPH mighty El Primero quickly became a […]