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:
The first used set spring assembly.
This is the second used click spring assembley also with a new escape wheel bridge.
This is the newer type set spring.
This is the oldest used click spring assembley with the first used escape wheel bridge.
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.
I have seen several J9 movements with a split barrel bridge.
Also in silver plated and with a special design.
| 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 |
| 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.
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