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  UK£ 
 
 
 Index  Timepiece Archive, Categories  Archive: Watch Movements    Timepiece Market 
 
View picture in original size
Fig. 1

View picture in original size
Fig. 2

Zenith 18.5'''NVSI open face

Features
stem wind and set
sub second

Data
18.5''', Dm= 41.25mm, Do= 42.05mm
H= 5.25mm
(regulator +0.2mm)
F= 0.5mm
T= 2.0mm
15/16 jewels
f = 18000 A/h
power reserve 36h

Balance staff U1044

Stem W1543

Hands
1.60 x 0.95 / 0.25mm

Comments about the data

Remarks
open face calibre (also made as hunter)
bimetallic screw balance
option: balance with 4 adjustment screws (example)
Breguet hairspring
cam disc regulator
negative stem mechanism for US market
in later samples click an regulator as illustrated for Zenith 16'''

Swiss Patent 27541:
design of the regulator
filed 01-19-1903, Hermann Roost, St-Imier (CH)
Swiss Patent 30751:
design of the stem mechanism
filed 05-19-1904, Georges Favre-Jacot & Cie., Locle (CH)

Example, year: signature; shock device
1912: 1166934, D+C (Dürrstein & Co.), Pat. Oct. 18, 1904 +30751, +27541

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
.