Junghans J15, updated 23.09.2020 - Helicopters, pocket watches, flight simulation, tools.

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Junghans J15, updated 23.09.2020

Junghans
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:
Master watch
1914 - 1925
Schramberg
Hunter case
J15
106
19'''
43,7 mm
43,0 mm
5,0 mm
18000 A/h
34 h
U409
W298
Junghans mentions 3 different stems
with 23,75 mm, 25,4 mm
and 26,4 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.

15






F.W.S 1942 page 18
Older type set spring.
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Older type click spring and set spring assembly.
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The later used click spring and set spring assembly.
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This is the newer type set spring.
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