Zenith
Calibre El Primero 3630
Automatic
Specifications
- Maker
- Zenith
- Type
- Automatic
- In-house
- Yes
- Power reserve
- about 60 h
- Frequency
- 36,000 vph (5 Hz)
Sources
- Official Zenith retrieved October 18, 2026
Used in
| Watch | Ø | Thickness | Lug-to-lug |
|---|---|---|---|
| Zenith DEFY Skyline Skeleton (18 ct rose gold) 18.9300.3630/78.I001 | 41 mm | 12.2 mm | — |