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Unitas 31 Movement Specifications, Beat Rate & Dimensions |
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Technical Caliber Datasheet
| Manufacturer | Unitas |
| Caliber Reference | Unitas 31 |
| Movement Type | Manual |
| Diameter (Lignes) | — |
| Diameter (mm) | 41.65 mm |
| Height / Thickness | 5.3 mm |
| Jewel Count | 15 Jewels |
| Beat Rate / Frequency | 18,000 BPH |
| Lift Angle | 51° |
| Power Reserve | 38 hours |
| Escapement | Swiss Lever |
| Production Period | 1920 |
Historical & Mechanical Notes
The Unitas 31 is a celebrated example of vintage precision engineering. Featuring 15 jewels and operating at 18,000 BPH, surviving examples are prized by collectors and restorers. For further technical reference on vintage watch movements, consult the Wikipedia: mainspring mechanics.
Restoration enquiries:
Other Unitas Movements
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