Junghans J38a
Mechanical
c. 1930
No photos yet
Notes
1930-
open face calibre
simple version of the J38 for the Jota models with steel pallets, only one jewel, imitated balance screws, and not gillt base plate
indirect minute, hand friction clutch on barrel (Roskopf type, although with separate minute wheel)
stem mechanism between plates
Dimensions
| Width | 41.25 lignes (93.05 mm) |
|---|---|
| Height | 5.3 mm |
| Stem height | 0.55 mm |
| Hands (H × M × S) | 1.82 × 1.16 × 0.22 mm |
Technical data
| Beat rate | 18,000 vph (2.5 Hz) |
|---|---|
| Lift angle | — |
| Power reserve | 33 h |
| Jewels | — |
| Shock protection | — |
| Mobile stud carrier | No |
Complications
| Self winding | No |
|---|---|
| Date | No |
| Day | No |
| Hacking | No |
| Chronograph | No |
Mainspring
| GR code | — |
|---|---|
| Height | 21 mm |
| Thickness | 0.2 mm |
| Length | — |
| Barrel diameter | 2.1 mm |
Overview
| Type | Mechanical |
|---|---|
| Manufacturer | Junghans |
| Year | c. 1930 |
| Family | — |
| Clone of | — |
Documents
None
Updated 7 days ago · 0 revisions