Help to find eb 8123 (Automatic) service or assembly documentation

[Vacherin]

Hi All,

Does anyone have a parts list or an exploded diagram for this movement? Any service documents or web resources for EB pin lever movements?

If anyone is cleaning one and has it fully apart a picture would be most appreciated! Alternatively a names of watches that had these would be useful and I could start googling.

Thanks!

[StuartBaker104]

Hmm, depends what info you are after and why. A detailed service guide is unlikely to exist, but here are some links...

There are a couple of teardowns of Bettlach movements on here... https://www.watchrepairtalk.com/topic/2674-heuer-jacky-ickx-eb8420-teardown/

https://www.watchrepairtalk.com/topic/1625-17-jewel-ebauches-bettlach-8800-walk-through/

Cousins has interchange parts lists here https://www.cousinsuk.com/document/category/eb-movement-parts

Or use Jules Borel, the 8123 is based on the 8120 so take a look at both links here http://cgi.julesborel.com/cgi-bin/matcgi2?begin=BET_&end=BET_&label=Calibres_Manufactured_by_BETTLACH

Ranfft describes the family

http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&&2uswk&EB_8100

 

 

S

[Vacherin]

I acquired some movements in pieces, and would like to know if they are complete, and if I can use 8800's for the missing parts.

[StuartBaker104]

As far as I can tell from these links 8800 is a base calibre of 12lignes and the 8123 is 11.5lignes and none of the parts seem to be interchangeable.

Can’t find a specific parts list but In theory you could work through all the interchange lists to get a complete list of part numbers and then use a standard swiss part numbers guide (e.g. in the bestfit catalogue http://www.obsoletewatchandclockparts.com/bestfitpages.htm) to work out what they all are.

[Vacherin]

Thanks Stuart.  Have been googling further with your info and found the 8135 and some useful pictures which is close but with date.

http://17jewels.info/movements-en/movements-e-en/movements-e-eb-en/222-eb-8135.html

That was fitted to a Cronel watch. Also Sheffield and Rocar used the 8123!