Gruen 179 (Universal 259)
Mechanical
c. 1925
No photos yet
Notes
1925-
bimetallic screw balance
Breguet hairspring
ingenious: one simple part replaces setting-lever spring, yoke, and yoke spring
Dimensions
| Width | 21.7 lignes (48.95 mm) |
|---|---|
| Height | 3.75 mm |
| Stem height | 0.5 mm |
| Hands (H × M × S) | 1.31 × 0.72 × 0.15 mm |
Technical data
| Beat rate | 18,000 vph (2.5 Hz) |
|---|---|
| Lift angle | — |
| Power reserve | 37 h |
| Jewels | — |
| Shock protection | — |
| Mobile stud carrier | No |
Complications
| Self winding | No |
|---|---|
| Date | No |
| Day | No |
| Hacking | No |
| Chronograph | No |
Mainspring
| GR code | Zf761 |
|---|---|
| Height | 8.5 mm |
| Thickness | 0.1 mm |
| Length | 250 mm |
| Barrel diameter | 1.25 mm |
Overview
| Type | Mechanical |
|---|---|
| Manufacturer | Gruen |
| Year | c. 1925 |
| Family | — |
| Clone of | — |
Documents
None
Updated 7 days ago · 0 revisions