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

View picture in original size
Fig. 3

View picture in original size
Fig. 4

Alfred Rochat 7750 (Valjoux 7750)

Features
automatic chronograph rattrapante, 60s, 30min, 12h, cam switched
split second: pusher at 10h, Schaltrad
sub second
date hand at 3h: quickset
hack feature

Data
13.25''', Dm= 30.0mm, Do= 30.4mm
H= 8.1mm
F= 2.1mm
T= 3.2mm
29 jewels
f = 28800 A/h
power reserve 46h

Balance staff U3777

Stem W3706 (thread 1.2mm)

Mainspring / battery
1.50 x 12.5 x 0.117 x 620mm

Hands
3.00 x 2.00 x 0.90 x 0.25 / 0.75 x 0.18 x 0.18 x 0.18mm

Comments about the data

Remarks
assembled directly on the modified base plate of the Valjoux 7750, original calendar module replaced by one with date hand

Example, year: signature; shock device
2003: Daniel Baumann, Swiss, 25 Jewels (Rattrapante + 4 jewels); Incabloc
1) back view
2) dial view
3) date/hand-gear plate removed
4) reset hammer with ruby roller (on cam-disc peak)

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)1575 2840629

email: info@ranfft.de
.