Gruen 381
Mechanical
c. 1939
No photos yet
Notes
1939-
open face calibre
Breguet hairspring
stem mechanism without setting-lever spring
Dimensions
| Width | 37.8 lignes (85.27 mm) |
|---|---|
| Height | 4.4 mm |
| Stem height | 2.2 mm |
| Hands (H × M × S) | 1.6 × 0.95 × 0.21 mm |
Technical data
| Beat rate | 18,000 vph (2.5 Hz) |
|---|---|
| Lift angle | — |
| Power reserve | 34 h |
| Jewels | — |
| Shock protection | — |
| Mobile stud carrier | No |
Complications
| Self winding | No |
|---|---|
| Date | No |
| Day | No |
| Hacking | No |
| Chronograph | No |
Mainspring
| GR code | GR2734 |
|---|---|
| Height | 1.1 mm |
| Thickness | 0.19 mm |
| Length | 420 mm |
| Barrel diameter | 15 mm |
Overview
| Type | Mechanical |
|---|---|
| Manufacturer | Gruen |
| Year | c. 1939 |
| Family | — |
| Clone of | — |
Related calibers
Documents
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Updated 7 days ago · 0 revisions