Winding: automatic

Frequency - Variations per hour: 5Hz - 36000 V/h

Power Reserve: 60 hours

Accuracy: -3/+5 seconds / day

Jewels: 35

Calibre El Primero 3600 , Zenith In-house manufacture

Swiss made

central hr

central min

small sec

Chronograph

Watch brands using this movement: Zenith Chronomaster