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Minerva 13-20 Movement Specifications, Beat Rate & Dimensions |
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Original Horological Blueprint • Minerva SA Minerva 13-20 Architecture
Technical Caliber Datasheet
| Manufacturer | Minerva |
| Caliber Reference | Minerva 13-20 |
| Movement Type | Manual |
| Diameter (Lignes) | — |
| Diameter (mm) | 29.33 mm |
| Height / Thickness | 6.4 mm |
| Jewel Count | 17 Jewels |
| Beat Rate / Frequency | 18,000 BPH |
| Lift Angle | 51° |
| Power Reserve | 38 hours |
| Escapement | Swiss Lever |
| Production Period | 1923 |
Historical & Mechanical Notes
The Minerva 13-20 is a celebrated example of vintage precision engineering. Featuring 17 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 Ranfft movement reference.
Restoration enquiries:
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