Omega 2892-2..

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I just need help recognising which exact watch this belongs too, I have seen many variations with SC at the end and other ending numbers, but nothing like this one.. any help appreciated.
 
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That’s the specific reference. What else did you want to know?
 
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so i will give some backstory to why I am enquiring, i recently purchased some contents from an estate sale.. there was a omega with this caseback, it however had a 268 movement, its been sitting in a drawer for a very very long time, i am trying to determine, if there was some crossover period for the movments in the early days, or the case back was changed etc
 
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Isn’t a 268 a sub second movement? Not center second. It’s better to show all the photos instead of parceling out info bit by not. Especially when you don’t know what you don’t know.
 
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correct, i found conflicting information saying there was a cross over period and they could have used it, but wanted to come to the hub for omega and find out for sure
 
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That makes no sense. Either it is a center second watch or a sub second. Which is it

You have the watch so we don’t know.
 
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If I were you, I would have included the whole story in your original post. Help the people who will help you.
 
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sub second watch, Rendo your right. thought it would be straight forward, will follow your suggestion for future posts.
 
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If it's a sub-second watch, that case-back is probably not original. It was likely swapped at some point. Some case-backs were dual use, and you will see two reference numbers (one sub-second and one center second). If it fits the case, I probably wouldn't worry too much about it. Unless there is something extremely special about the dial, the value of the watch is fairly modest and a slightly wrong case-back won't make much of a difference.
 
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Thank you for your help, i dont have the watch on me now to take a photo but it looks similar to the example i included

 
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It seems like you have a 2791 with a 268 movement, but the caseback is incorrect. You can start searching on eBay and with patience, you should be able to find one.

edit: Based on a quick search, I'm actually not sure if a 2791 came with caliber 268. It's best if you post photos of the watch once you have it in your possession.
Edited:
 
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That case back after a check say caliber 284 sweep. Tall crystal or low crystal?

30 mm movements had some interchangeable parts between them.

Would a sub second fit in the case and stem line up with case post? Perhaps wrong back with correct movement or correct back and wrong movement
 
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DON DON
Perhaps wrong back with correct movement or correct back and wrong movement
How about a wrong case? A sub-second movement should fit in the thicker center seconds case with proper clamps. It is unlikely that a center seconds movement would fit in a slimmer sub-seconds case.

gatorcpa
 
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How about a wrong case? A sub-second movement should fit in the thicker center seconds case with proper clamps. It is unlikely that a center seconds movement would fit in a slimmer sub-seconds case.

gatorcpa
Main case could be the same, but the back could be a little deeper to allow for the sweep bridge. The main plate would be the same thickness. I could measure the two if that helps to check thickness