Zenith · Movement

Zenith caliber El Primero 3604

Ref. El Primero 3604

The Zenith caliber El Primero 3604 is an automatic movement with a 60-hour power reserve, beats at 36,000 vph, and carries 35 jewels.

The El Primero 3604 1/10 th of a second automatic chronograph movement is a modified version of the 3600 that debuted in the CHRONOMASTER Sport, featuring an open base plate and bridges that allow for a clearer view of the high-frequency 5Hz escapement with lubricant-free silicon escape wheel and pallet lever. The automatic winding mechanism efficiently delivers a power reserve of 60 hours. Automatic El Primero column-wheel chronograph able to measure and display the 1/10th of a second Central chronograph hand that makes one turn in 10 seconds Increased power reserve of 60 hours Stop second mechanism Certified Chronometer

Type: Automatic
Display: Analog
Power reserve: 60 h
Frequency: 36000 vph
Jewels: 35
Diameter: 30 mm
Complications: Chronograph, Column wheel, Hours, Minutes, Small Seconds