Junghans J17, updated 23.09.2020 - Helicopters, pocket watches, flight simulation, tools.

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Junghans J17, updated 23.09.2020

Junghans
Master watch
1927 - 1930
Hunter case
J17, J17a
106
18,5'''
41,8 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.

35g


Kind:
Production:
Type:
Variants:
Catalog Group:
Size:
Nominal Diameter:
Height:
f:
Power reserve:
Balance staff:
Stem:



Mainspring:


Reference picture:
Movement weight:
J17 dial site
J17 movement site
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