Junghans J9
Mechanical
c. 1910
No photos yet
Notes
1910-1923
open face calibre
monometallic screw balance with press-fit staff
Breguet hairspring
option: separate crown-wheel bridge (Fig.3)
early samples (Fig.1-2) like J8 with lever bridge, brass lever and -escape wheel
later (Fig.3-6) lever cock, steel lever and -escape wheel
further detail modifications during production periode cf. photos
The balance with press-fit staff and with riveted staff (of the later J13...J17) are completely with hairspring interchangable.
Dimensions
| Width | 41.45 lignes (93.5 mm) |
|---|---|
| Height | 5 mm |
| Stem height | 0.55 mm |
| Hands (H × M × S) | 1.85 × 1.14 × 0.21 mm |
Technical data
| Beat rate | 18,000 vph (2.5 Hz) |
|---|---|
| Lift angle | — |
| Power reserve | 35 h |
| Jewels | — |
| Shock protection | — |
| Mobile stud carrier | No |
Complications
| Self winding | No |
|---|---|
| Date | No |
| Day | No |
| Hacking | No |
| Chronograph | No |
Mainspring
| GR code | Zf3495 |
|---|---|
| Height | 16 mm |
| Thickness | 0.2 mm |
| Length | 460 mm |
| Barrel diameter | 2 mm |
Overview
| Type | Mechanical |
|---|---|
| Manufacturer | Junghans |
| Year | c. 1910 |
| Family | — |
| Clone of | — |
Documents
None
Updated 7 days ago · 0 revisions