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Zenith Calibre 135 Movement Specifications, Beat Rate & Dimensions |
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Technical Caliber Datasheet
| Manufacturer | Zenith |
| Caliber Reference | Calibre 135 |
| Movement Type | Observatory Chronometer |
| Diameter (Lignes) | 13.25''' |
| Diameter (mm) | 30.0 |
| Movement Thickness | 5.0 |
| Jewel Count | 19 Jewels |
| Vibrations Per Hour | 18,000 BPH (2.5 Hz) |
| Balance Lift Angle | 50° |
| Power Reserve | 40 hours |
| Escapement Type | Oversized balance chronometer |
| Shock Protection System | Incabloc |
| Production Era | 1948-1962 |
| Wristwatch Conversion Rating | Neuchâtel Observatory prize winner |
Historical & Mechanical Notes
The Zenith Calibre 135 is revered among horologists for its mechanical architecture and precision timing characteristics. Operating with an oscillation rate of 18,000 BPH and a 50° lift angle, this movement exemplifies vintage fine watchmaking standards.
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