Fake back case? (UPDATE)

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Hi all.
I have a doubt and hope you can help me.
Following the "Vintage Omega Posting Guide":
1.- Sorry, those pictures came from the seller.


2.- This is a Omega 18K Rose Gold cal.267 c.1950s. Recently serviced. Not original strap but with original buckle. I guess from USA market...

3.- And this is my concern:


I never have seen an inside logo on back case like this. This is not the common Omega triangle with the Omega letter...
It is possible that the back case could be faked?

4.- It is on sale (I´m interested, that why I'm looking information, making the homework).

PLEASE, feed backs will be gratefully welcome.
 
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I'm scared of sellers who wear gloves to list their pieces. Just came here to say that. 😁
 
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Looks somewhat typical of a South American case, definitely NOT USA.
 
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Real movement... high quality local market marked case.... 12k marked... obvious damage on a lug to show it’s not plated....

And what exactly is the question?
Edited:
 
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Finished.

Thanks to KingCrouchy references and
BlackTalon I could verify that the piece is authentic even with a cage made locally (not Swiss). And besides, it's a great caliber so I'm going to make an offer.

Thanks

PS. 0'750 means 75% gold or 18K, not 12K.
 
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Finished.

Thanks to KingCrouchy references and
BlackTalon I could verify that the piece is authentic even with a cage made locally (not Swiss). And besides, it's a great caliber so I'm going to make an offer.

Thanks

PS. 0'750 means 75% gold or 18K, not 12K.
I was going by what it looked like and was tired.
 
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Looks somewhat typical of a South American case, definitely NOT USA.

Ha, and nothing to do with South America either. 🙄

Where the watch originated from …and it’s current Country…can, of course, be two different locations ?

The damage to the lug…suggests ‘hollow lugs’ ?

The angle of the crown looks ‘skew whiff’? …so the winding stem could be bent
 
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Where the watch originated from …and it’s current Country…can, of course, be two different locations ?

The damage to the lug…suggests ‘hollow lugs’ ?

The angle of the crown looks ‘skew whiff’? …so the winding stem could be bent

Yesterday I had this watch on my hands and ...
It's correct, the crown is not original, it's omega but not the original one, the color is different and the stem... I'm not sure.
Lugs, are worn but I'm not sure if they are hollow.
Origin ... Nobody knows, but now it's in southwest border US.
 
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Certainly was not made for the American market.
No OGX engraving on movement or hallmarks in case.
 
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The damage to the lug…suggests ‘hollow lugs’ ?

The damage to the back side of the lugs? Those marks look like wear from a bracelet to me. Probably a steel/plated steel bracelet that has rubbed a mark in the gold.
 
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@ConElPueblo Yes, the lugs were rubbed or carved by some kind of bracelet. 😕

UPDATE:
But finally I decided not to buy this piece (the one on the top of the thread) and made a big mistake that I want to share with you.
I finally bought another watch, the one on the following pictures, and the next day I regretted it.



Why I regret it? Not sure, I just didn't love it.
I don't know if that happened to any of you, but sometimes it happens to me...
I appreciate your comments in this thread.
Thanks to all.