Gruen 421SS
Mechanical
c. 1942
No photos yet
Notes
1942-
Breguet hairspring
stem mechanism without setting-lever spring
Dimensions
| Width | 25.5 lignes (57.52 mm) |
|---|---|
| Height | 4.85 mm |
| Stem height | 2.2 mm |
| Hands (H × M × S) | 1.22 × 0.66 × 0.22 mm |
Technical data
| Beat rate | 18,000 vph (2.5 Hz) |
|---|---|
| Lift angle | — |
| Power reserve | 40 h |
| Jewels | — |
| Shock protection | — |
| Mobile stud carrier | No |
Complications
| Self winding | No |
|---|---|
| Date | No |
| Day | No |
| Hacking | No |
| Chronograph | No |
Mainspring
| GR code | — |
|---|---|
| Height | 9 mm |
| Thickness | 0.11 mm |
| Length | 250 mm |
| Barrel diameter | 1.15 mm |