Vintage bumper Omega with no case number on the caseback.

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Has anyone come across a vintage Omega with no case number or numbers on the caseback?

This is the watch notice the caseback-
 
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It's an Illuminati special maybe?

After all, many Masonic Omega's, why not Illuminati
 
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Hi,

I think you've already posted this on facebook.

The lugs on the watch are distinctively found on bumper movements.
I'd like to see the dial & the outside of the caseback to get a better idea of what it is.

But, if you haven't already bought the watch, don't. The case is bad.
 
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Hi,

I think you've already posted this on facebook.

The lugs on the watch are distinctively found on bumper movements.
I'd like to see the dial & the outside of the caseback to get a better idea of what it is.

But, if you haven't already bought the watch, don't. The case is bad.
Thanks for the advice. Much appreciated. I did post on FB but just the front of the watch. Let take another photo of the movement. I did a double take because of what you highlighted and mentioned. It's a piece of tissue that was caught when I phographed the movement. The back seems fine.
 
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Given the movement serial number which indicates a 1954 year of manufacture, what I can see of the lug shape, the small seconds subdial, the Breguet numerals on the dial and the type of crown, my guess would be a reference 2576 or something similar. 34mm case? .
 
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I'd be more concerned with the severe wear to the winding pendulum than to the lack of reference number.
 
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I'd be more concerned with the severe wear to the winding pendulum than to the lack of reference number.
Agreed.
 
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I'd be more concerned with the severe wear to the winding pendulum than to the lack of reference number.
Have you ever seen one without any referrence number since that was my concern since I find it odd, not that I've seen a lot. Can you kindly point out which one is the winding pendulum?
Edited:
 
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Given the severe corrosion to the case, a damaged case-back may have been replaced.
 
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Have you ever seen one without any referrence number since that was my concern since I find it odd, not that I've a lot. Can you kindly point out which one is the winding pendulum?

Wear indicated by blue arrows.

 
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Wear indicated by blue arrows.


Thanks for pointing that out. I did take a look and yes it seems that they're rubbing against each other. I've learned something new. I really appreciate it. What's the best fix for this?
 
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But it still makes me wonder how come the caseback doesn't have any identifying numbers. Was it an original Omega replacement part?........
 
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Hi,

I think you've already posted this on facebook.

The lugs on the watch are distinctively found on bumper movements.
I'd like to see the dial & the outside of the caseback to get a better idea of what it is.

But, if you haven't already bought the watch, don't. The case is bad.

I took photos of the same watch again.
 
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The case was not made by Omega.
The company contracted to provide these cases may have had a slip in quality control and one caseback missed the stamp.
 
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The case shows no signs of having a gasket. That could be a contributing factor concerning the rotor rubbing on the inner surface of the case back.
 
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The case shows no signs of having a gasket. That could be a contributing factor concerning the rotor rubbing on the inner surface of the case back.
Thanks.