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

Eterna 520U

manual wind
sub second

12''', Dm= 26.5mm
H= 4.0mm
15 jewels
f = 18000 A/h
power reserve 42h

Balance staff U620

Stem W620

Mainspring / battery
Zf968, 1.35 x 10.5 x 0.13 x 300mm

1.38 x 0.80 / 0.21mm

Comments about the data

first Eterna calibre for gents wrist watches

Example, year: signature; shock device
1-2) 1946: 3204795, Eterna; Eterna-H
(Eterna 520H)
3) 1953: 3862267, Eterna; Eterna-U
(Eterna 520SU, sweep second)

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