Pink Pages
for Timepieces
All Items
Ranfft Items
Brand Shops
Commit an Item
How to do right
Condition of Watches
About Watches
  Help   Log In  Register, Clients   Deutsch  English  EUR  US$  CHF  UKŁ 
 Index  Timepiece Archive, Categories  Archive: Watch Movements    Timepiece Market 
View picture in original size
Fig. 1

View picture in original size
Fig. 2

View picture in original size
Fig. 3

Junghans J17

stem wind and set
sub second

18.5''', Dm= 41.4mm, Do= 42.0mm
H= 5.0mm
(winding gear +0.1mm)
F= 0.6mm
T= 2.4mm
15 jewels
f = 18000 A/h
power reserve 35h

Balance staff U408 / U409
(press fit / riveted)

Stem W297

Mainspring / battery
Zf3495, 2.00 x 16.0 x 0.20 x 460mm

1.85 x 1.15 / 0.21mm

Comments about the data

hunter calibre
bimetallic screw balance with riveted staff
option: monometallic screw balance with press-fit staff
Breguet hairspring
in late samples setting-lever spring and click spring modified (Fig.1-3, cf. J15)
The balance with press-fit staff (even from the earlier J9) and with riveted staff are completely with hairspring interchangable.

J13: open face, 19'''
J14: open face, for Alpina with separate escape-wheel cock
J15: hunter, 19'''
J16: open face, 18.5'''
J17: hunter, 18.5'''

Example, year: signature; shock device
1-2) ca. 1925: 0418890, Junghans 17 - 4037
3) ca. 1925: 0428252, Junghans, 17

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

bidfun home
...the alternative - free of charge!
Dr. Roland Ranfft
Poststr. 32a
26388 Wilhelmshaven
phone +49 (0)4423 9849691

email: info@ranfft.de