1933 – 1950s
Specifications
| Lignes | 8 ‴ x 11.5 ‴ |
|---|---|
| Mounting Diameter | 17.8 x 26.55 |
| Thickness | 4 |
| Frequency (vph) | 18,000 |
| Jewels | 17 |
| Power Reserve | 43 |
| Hand Sizes | 1.33, 0.76, 0.20 |
| Complication | Subsidiary Seconds |
| Power | Manual |
| Shape | Rectangle |
| Size | Rectangle |
Notes
25.17, 9L: bimetallic balance, Breguet hairspring
25.173: monometallic balance, Breguet hairspring base plate, barrel bridge, regulator modified
25.17, 9L new: bimetallic balance, Breguet hairspring