Alpina 431 (Gruen 431)
Overview
| Type | Mechanical |
|---|---|
| Manufacturer | Alpina |
| Year | ~1940 |
Documents
No documents
Notes:
1940-
Breguet hairspring
stem mechanism without setting-lever spring
Dimensions
| Width | 19.4 lignes |
|---|---|
| Height | 4.05 mm |
| Stem height | 2.0 mm |
| Hands diameter (H x M x S) | 1.22 x 0.66 x 0.16 mm |
Technical data
| Lift angle | ° |
|---|---|
| Beat rate | 18000 BPH |
| Jewels count | |
| Power reserve | 37 hours |
| Shock protection | |
| Mobile stud carrier | false |
Complications
| Self winding | no |
|---|---|
| Date | false |
| Day | false |
| Hacking | false |
| Chronograph | false |
Mainspring
| GR code | |
|---|---|
| Length | 250 |
| Height | 8.5 |
| Thickness | 0.105 |
| Diameter | 1.18 |