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

View picture in original size
Fig. 4

AS 1920 Chronospeed

sweep second
date: quickset by repeated pushing the crown

12.5''', Dm= 28.0mm, Do= 28.35mm
H= 5.2mm
(dial spacer +0.1mm)
F= 2.0mm
T= 2.5mm
17/25 jewels
f = 36000 A/h
power reserve 46h

Balance staff U3424

Stem W3334

Mainspring / battery
1.15 x 11.5 x 0.15mm

1.5 x 0.90 x 0.20mm

Comments about the data

1970-1974, only low volume production
AS2 lever regulator
originally designed for the chromometer ASSA Chronospeed 1920, but also applied by few other companies

Example, year: signature; shock device
1-2) 1970: Swiss, 25 Jewels; Incabloc (uncertified prototype, Technos rotor not original)
1970: unsigned prototype; Incabloc

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