Junghans J9

Kind:
Production:
Production site:
Type:
Variants:
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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:
 
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
 
 
 
This is the oldest used click spring assembly with the first used escape wheel bridge.The first used set spring assembly.This is the second used click spring assembly also with a new escape wheel bridge.This is the newer type set spring.
I have seen several J9 movements with a split barrel bridge.Several once with a bigger main plate.This is the latest used click spring assembly used.A combination of bigger main plate and split barrel bridge.
  
Also in silver plated and with a special design.   

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