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

Alpina 490A

manual wind
sub second

8.75 x 12''', Dm= 19.35 x 26.3mm
H= 3.8mm
15 jewels
f = 18000 A/h
power reserve 45h

Balance staff U1704

Stem W2063

Mainspring / battery
Zf873, 1.30 x 10.0 x 0.11 x 320mm

1.50 x 0.70 / 0.20mm

Comments about the data

straight lever (ligne angulaire)
differences not known between 490, 490A

Swiss Patent 158882:
filed 11-21-1931, Straub & Co. Fabriques des Montres Alpina (CH)
lever for secure fixing of the stem in the movement, as long as it is in the case shell (lever in Fig.3)

Example, year: signature; shock device
ca. 1935: 224282, Alpina 490A - Pat.+158882 (under barrel bridge)

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