Junghans J10, updated 12.09.2020
Junghans
Alarm pocket watch
1911 - 1921
Open face
J10
101
18,5'''
41.85mm
41,4 mm
7,8 mm
18000 A/h
54/66 h
U427, 427 ST
W773
Zf3923, 550 x 2,5 x 0,2 mm
Junghans mentions spring number
1009 515 x 2,55 x 0,205 mm
F.W.S 1942 page 47
3/5/7/11
98 gr
51 gr
Schramberg
The J10 was the replacement for the Junghans J5 in 1910 and the J10 was relaced by the J36 in 1923.
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J10, picture courtesey of Ralf Hoffmann
J10, picture courtesey of Ralf Hoffmann
Pictures of the J10 movement #7616 above are courtesy of Ralf Hoffmann.
J10, image courtesey Jens Weißler
Picture of the J10 movement #110419 above is courtesy of Jens Weißler.
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Part chart from 1913, courtesy of JUNGHANS GMBH & CO.KG
How to seperate J5 from J10 and J36.
image
The J10 bell to the right is marked with "Reichskrone". That is the only one I have seen so far and no other information about the usage of "Reichskrone" on Junghans watches or clocks is known. Picture courtesy of Ralf Hoffmann.
J10 bell marked with Reichskrone, picture courtesey of Ralf Hoffmann
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