Zenith
Calibre El Primero 9004
Automatic chronograph
Specifications
- Maker
- Zenith
- Type
- Automatic chronograph
- In-house
- Yes
- Power reserve
- about 50 h
- Frequency
- 36,000 vph (5 Hz)
Sources
- Official Zenith retrieved October 18, 2026
Used in
| Watch | Ø | Thickness | Lug-to-lug |
|---|---|---|---|
| Zenith DEFY Extreme (carbon and titanium) 10.9102.9004/51.I200 | 45 mm | 15.4 mm | — |
| Zenith DEFY Extreme (titanium) 97.9100.9004/80.I209 | 45 mm | 15.4 mm | — |