Specifications
| Lignes | 13 ‴ |
|---|---|
| Mounting Diameter | 29 |
| Thickness | 3.2 |
| Frequency (vph) | 21,600 |
| Jewels | 17 |
| Power Reserve | 46 |
| Hand Sizes | 1.50, 0.79, 0.22 |
| Power | Manual |
| Shape | Round |
| Size | Large |
Notes
The base calibre was passed from Election to Marvin ca. 1960, and finally to Longines in the late 60s.