HomeRanfft
Watches
Pink Pages
for Timepieces
.
Home
All Items
Ranfft Items
Brand Shops
Commit an Item
How to do right
Condition of Watches
About Watches
Links
  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

Bifora B12

Features
quartz controlled pin lever
sweep second
day: set by +/-24h
date: quickset by turning the crown forth and back
hack feature

Data
13''', Dm=Do= 29.35mm
H= 5.65mm
T= 2.9mm
5 jewels
f = 32768 Hz

Stem W3417

Mainspring / battery
313 (original, mercury), 357 (replacement, silver odixe)

Hands
1.40 x 0.80 x 0.24mm

Comments about the data

Remarks
1973-
strange: There is neither a stepper motor nor a quartz-controlled balance, but a pin lever with inductor, which is actuated once per second.
The mechanic was taken to wide extent from the electronical predecessor B11, with the pin lever replacing the original balance.

family/generations:
B8: 8.25''', electrical*
B9: 13''', electrical*
B10: 8.25''', electronical
B11: 13''', electronical
B11: 13''', quartz
*) prototypes, never serielly produced

Example, year: signature; shock device
ca. 1975: Bifora

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
Erkelenzer Str. 98
41844 Wegberg
Germany
phone +49 (0)2434 6034670

email: info@ranfft.de
.