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

Gruen 355C

Features
manual wind
sub second

Data
7.75 x 11.75''', Dm= 17.65 x 26.4mm
H= 3.95mm
15 jewels
f = 18000 A/h
power reserve 40h

Balance staff U2415

Stem W2162

Mainspring / battery
1.18 x 8.5 x 0.105 x 250mm
~Zf665, 1.20 x 8.5 x 0.095 x 265mm

Hands
1.22 x 0.66 / 0.16mm

Comments about the data

Remarks
1935-1937
Breguet hairspring
to wide extent like 500, but optimized for curved models
Conoruma is Gruen's proprietary alloy for hairspring and balance with low temperature dependence

family:
311: Curvex, curved back surface
355: flat dial surface, plane back surface
355C: curved dial surfce, plane back surface

Example, year: signature; shock device
1937: 328811, 500, Gruen Watch Co, Switzerland, Coronuma Hrsp. & Bal., 15 Jewels
(Gruen 501 signed as 500)

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
.