Junghans J15
Mechanical
c. 1914
No photos yet
Notes
1914-
hunter calibre
bimetallic screw balance with riveted staff
option: monometallic screw balance with press-fit staff
Breguet hairspring
in late samples setting-lever spring and click spring modified (Fig. 3,4)
sometimes smaller balance cock from J17 (Fig.5)
The balance with press-fit staff (even from the earlier J9) and with riveted staff are completely with hairspring interchangable.
Dimensions
| Width | 43 lignes (97 mm) |
|---|---|
| Height | 5 mm |
| Stem height | 0.6 mm |
| Hands (H × M × S) | 1.85 × 1.15 × 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. 1914 |
| Family | — |
| Clone of | — |
Documents
None
Updated 7 days ago · 0 revisions