Junghans J9, updated 05.05.2022
Junghans
Quality watch
1910 - 1921
Schramberg
Open face
several changes in parts
104
18,5''' and 19,5'''
42,1 mm and 44,6 mm
41,45 mm
5,1 mm
18000 A/h
34 h
U408, DCN179, RONDA1301
W297, DCN167, RONDA2273
Junghans mentions 3 different stems
with 22,5 mm, 23,75 mm
and 25,0 mm length.
Zf3495, 460 x 16,0 x 2 x 0,20 mm
Junghans mentions spring
number 1002 465 x 2,0 x 0,20 mm.
42°
15
1.82 x 16 mm
1.15 x 20 mm
0.21 x 7 mm
11.7 mm
CW 30.68 mm
FW 48.97 mm
CW 33.64 mm
FW 22.41 mm
35g
F.W.S 1947 page 74
Kind:
Production:
Production site:
Type:
Variants:
Catalog Group:
Size:
Outer Diameter:
Nominal Diameter:
Height:
f:
Power reserve:
Balance staff:
Stem:
Mainspring:
Liftangle:
Jewels:
Hour hand:
Minute hand:
Seond hand:
Distance center to Second wheel:
Dial feet position:
Movement weight:
Reference picture:
![-](images/J9-NW-GP-ZS-001.jpg)
![-](images/J9-NW-GP-WS.jpg)
![image](images/nrpl479.jpg)
![-](images/J9-4.jpg)
![-](images/J9-1.jpg)
The first used set spring assembly.
This is the second used click spring assembley also with a new escape wheel bridge.
![-](images/J9-2.jpg)
This is the newer type set spring.
![-](images/J9-3.jpg)
This is the oldest used click spring assembley with the first used escape wheel bridge.
![-](images/J9-NW-GP-WS2.jpg)
![-](images/variant.jpg)
![-](images/J9-NG-WS-rot.jpg)
This is the latest used click spring assembley used.
A combination of bigger main plate and split barrel bridge.
Several once with a bigger main plate.
![-](images/J9-6.jpg)
I have seen several J9 movements with a split barrel bridge.
![-](images/J9-Sliber-US-Muster.jpg)
Also in silver plated and with a special design.
![image](images/Raederwerk-004.jpg)
![image](images/Raederwerk-005.jpg)
![image](images/Raederwerk-006.jpg)
J9, number of teeth | ||
410 | Winding pinion | 8 |
16 | ||
407 | Clutch wheel | 8 |
17 | ||
420 | Crown wheel, upper | 35 |
415 | Ratchet wheel, upper | 60 |
180 | Barrel | 96 |
201 | Center wheel | 12 |
80 | ||
210 | Third wheel | 10 |
75 | ||
224 | Fourth wheel | 10 |
70 | ||
705 | Escape wheel | 7 |
15 | ||
240 | Cannon pinion | 12 |
260 | Minute wheel | 10 |
36 | ||
250 | Hour wheel | 45 |
![-](images/J9-Wellen.png)
J8, number of teeth | ||
410 | Winding pinion | 10 |
16 | ||
407 | Clutch wheel | 10 |
17 | ||
420 | Crown wheel, upper | 39 |
415 | Ratchet wheel, upper | 51 |
180 | Barrel | 90 |
201 | Center wheel | 12 |
80 | ||
210 | Third wheel | 10 |
75 | ||
224 | Fourth wheel | 10 |
70 | ||
705 | Escape wheel | 7 |
15 | ||
240 | Cannon pinion | 12 |
260 | Minute wheel | 12 |
36 | ||
250 | Hour wheel | 40 |
-
The picture to below shows the "J9" dashboard clock in the cockpit of a Zeppelin-Staaken VGO I. Picture courtesy of Sammlung Peter W. Cohausz.
![](pluginAppObj/pluginAppObj_238_46/Staaken-VGO-I-002_primary.jpg)
One possibility for the bigger main plate is the usage as a dashboard clock. Pictures courtesy of Oliver Jordan www.deutscheluftwaffe.de
A second one with serial number 85179.
J9 Borduhr
J9 Tafel