ETA 1091
Mechanical
No photos yet
Notes
option Incastar regulator:
The only large-scale produced regulator featuring a free oscillating hairspring. The end of the spring is fixed between two rollers, adjusting actually its length (photos at the bottom). No isochronism error by the gap between the regulator pins.
differences not known between 1090, 1091, 1190, 1191
Dimensions
| Width | 18.5 lignes (41.73 mm) |
|---|---|
| Height | 4.3 mm |
| Stem height | — |
| Hands (H × M × S) | 1.5 × 0.9 × 0.2 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 | GR3251 |
|---|---|
| Height | 1.3 mm |
| Thickness | 0.1 mm |
| Length | 260 mm |
| Barrel diameter | 6 mm |
Overview
| Type | Mechanical |
|---|---|
| Manufacturer | ETA |
| Year | — |
| Family | — |
| Clone of | — |
Documents
None
Updated 7 days ago · 0 revisions