The Chronomaster Original is equipped with the latest version of the El Primero 3600 caliber, the result of 50 years of gradual refinement and a true self-winding chronograph movement with high oscillation frequency. 5 Hz (36,000 VpH) high frequency oscillation allows for highly accurate 1/10th of a second measurements. The duration of the watch has also been improved. The duration has also been improved, with a power reserve of 60 hours.

The back of the see-through case provides a clear view of the modern construction, including the blued column wheel and the open rotor with the Zenith Star.