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|Bulova 12B (Junghans 689.70 / J89)|
12.5''', Dn= 28.20mm
H= 6.4mm (5.5mm without sweep second)
f = 18000 A/h
Balance staff U1518
Mainspring / battery
Zf1403, 1.70 x 11.5 x 0.12 x 385mm
2.20 x 1.41 x 0.79 x 0.18mm
Comments about the data
especially made by Junghans for Bulova with 17 Jewels
common barrel for watch and alarm
ratchet on dial side, crown mechanism with rocker bar
Wind watch and alarm: crown at 3h.
Set time: pull crown at 3h and set time. If you set the time reverse and pass the alarm time, this will be set reverse simultaneously.
Set alarm: crown at 2h. The alarm time can only be set reverse, setting forward is inhibited by a freewheel.
Enable alarm: push pusher at 4h.
Disable alarm: pull pusher at 4h.
Example, year: signature; shock device
ca. 1955: Junghans 89; Junghans II
(Junghans 689.70, 20 jewels)
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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