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View picture in original size
Fig. 1

View picture in original size
Fig. 2

Junghans J10

Features
stem wind and pin set alarm
sub second

Data
18.5''', Dm= 41.4mm, Do= 41.85mm
H= 8.2mm
(winding gear +1.0mm)
F= 1.7mm
T= 4.3mm
7/10/11 jewels
f = 18000 A/h
Gangreserve 28/44h
(alarm on/off)
alarm 15s

Balance staff U427

Stem W773

Mainspring / battery
Zf3923, 2.60 x 17.0 x 0.21 x 490mm

Hands
3.45 x 2.0 x 1.40 / 0.25mm

Comments about the data

Remarks
1911-1924
open face calibre
ratchet on dial side, crown mechanism with rocker bar
watch and alarm driven by a single barrel:
A device makes 2 revolutions of the mainspring arbor available for the alarm; the clutch wheel for the alarm works simultanously as ratchet.
The alarm loudness is adjustable to certain extent with a screw at 5:30h (under bezel), but a louder alarm reduces the alarm duration.

generations:
J10: pusher for alarm setting
J36: rear crown for alarm setting, new stop device for alarm

Operating Instruction:
Wind watch and alarm: crown.
Set time: crown, pusher at 1h held down. If you set the time reverse and pass the alarm time, this will be set reverse simultaneously.
Set alarm: pusher at 11h. Every push will decrement the alarm time by 12 minutes, but with not completely pressing down the alarm can be set to any time.
Enable/disable alarm: lever on back side

Example, year: signature; shock device
ca. 1915: 010844, Junghans

Not for Sale!
The movements presented in this caliber finder are not for sale. This is only a data sheet for identification and evaluation of the movement calibre, as well as for approximate dating.

bidfun-db 21.3 © 02-08-15, mtr-Ranfft


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