Who's the best case maker of vintage omegas?

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The only "EW" I can think of is Ed. Wenger S.A. - not sure if that's likely though: I know I can't find either your mark or theirs (other than the famous Key no.1) online...
 
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Another one for you, if I may?

anyone know the case maker, of what looks like an EW, found on this F300 Omega Connie Hummer, ref 198.0024 please?

The case on this has the Bulova name etched on, as well as Omega.
Is there an explanation for this?
Just like to know more on casings.
Thanks, John.
 
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The case on this has the Bulova name etched on, as well as Omega.
Is there an explanation for this?
Just like to know more on casings.
Thanks, John.

Omega licensed the tuning-fork technology for their f300 watches from Bulova.
 
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Omega licensed the tuning-fork technology for their f300 watches from Bulova.
Thanks for that info, I didn't know there was a tech agreement with the two companies.
Learn something new everyday.
 
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Does Anyone have a clue on this please?
Hi Sherbie, I came across this thread as I was researching a vintage watch with a unknown casemark myself. I also found a very useful website for casemarks. So, although it’s months after you posted your questions, perhaps this can be of help:

http://www.mikrolisk.de/show.php?site=280



K.B. is probably referring to Bielna. The other mysterious casemark (EW?) I haven’t found but there’s a good chance you’ll find out more about it on this site. Good luck!

regards, Arjen
 
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Did anyone ever answer the question of who made the KB in a lozenge stamped watch case, I have seen Omega, Longines and a few unbranded watches with this stamp on the case and can't believe no one has identified the maker yet? come on, surely someone knows?