Gruen 355
Mechanical
c. 1935
No photos yet
Notes
1935-1937
Breguet hairspring
to wide extent like 500, but optimized for flat models
Conoruma is Gruen's proprietary alloy for hairspring and balance with low temperature dependence
Dimensions
| Width | 17.65 lignes (39.81 mm) |
|---|---|
| Height | 3.95 mm |
| Stem height | — |
| Hands (H × M × S) | 1.22 × 0.66 × 0.16 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 | GR2622 |
|---|---|
| Height | 1.1 mm |
| Thickness | 0.11 mm |
| Length | 240 mm |
| Barrel diameter | 8.5 mm |
Overview
| Type | Mechanical |
|---|---|
| Manufacturer | Gruen |
| Year | c. 1935 |
| Family | — |
| Clone of | — |
Related calibers
Documents
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Updated 7 days ago · 0 revisions