Zenith caliber El Primero 3610

The result of over 50 years in mastering the automatic high-frequency chronograph movement. The latest version of the El Primero calibre, dubbed the El Primero 3610, operates at the high frequency of 5Hz, with the ability to offer a 1/10th of second indication for the first time on the triple calendar and moonphase caliber. Its autonomy has also been efficiently extended to a power reserve of 60 hours.