Junghans Pocketwatch, movement J15 - Helicopters, pocket watches, helicopter flight simulation and more.

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Junghans Pocketwatch, movement J15

Junghans
Kind:
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Outer diameter:
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f:
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Balance staff:
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Mainspring:


Reference picture:
Jewels:
Master watch
1914 - 1930
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.
F.W.S 1942 page 18
15
Junghans catalog 1914 extract:
hunter case Junghans "Master" Watch, 15 jewels, cut compensation balance, hardened Breguet steel hair spring, lever escapement with visible jewels, steel escape wheel, double safety roller, gilt plates gold or silver.
The watch will come with the factories certificate of warranty.

Junghans catalog 1923 extract:
Junghans "Master" Watch, Movement No. J15 with 15 jewels, cut compensation balance steel Breguet spring, lever escapement with visible jewels, double safety roller, gilt plates.

Junghans catalog 1930 extract:
Junghans "Master" Watch, Hunting case, Bridge movement, Movement No. J15 with 15 jewels, cut compensation balanceand Breguet hair spring, lever escapement with visible jewels, double safety roller, gilt plates. 1 velvet-lined case for each watch gratis.
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This is the newer type set spring.
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The later used click spring and set spring assembly.
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Older type click spring and set spring assembly.
Older type set spring.
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