Gruen 271SS
Mechanical
c. 1937
No photos yet
Notes
1937-
Breguet hairspring
Dimensions
| Width | 15.35 lignes (34.63 mm) |
|---|---|
| Height | 4.15 mm |
| Stem height | 1 mm |
| Hands (H × M × S) | 0.95 × 0.66 × 0.15 mm |
Technical data
| Beat rate | 18,000 vph (2.5 Hz) |
|---|---|
| Lift angle | — |
| Power reserve | 36 h |
| Jewels | — |
| Shock protection | — |
| Mobile stud carrier | No |
Complications
| Self winding | No |
|---|---|
| Date | No |
| Day | No |
| Hacking | No |
| Chronograph | No |
Mainspring
| GR code | GR2780 |
|---|---|
| Height | 1.15 mm |
| Thickness | 0.08 mm |
| Length | 200 mm |
| Barrel diameter | 6.5 mm |