The dial is likely from a 2577 model -
Vintage Uhren: Seamaster CK 2577 | OMEGA DE® (omegawatches.com)
But the "OMEGA" that you see on the dial seems to be added afterwards (the original sign probably was erased/worn-off).
The lugs to the case though seem a bit unusual (through the view of my limited experience) - I think these are called fancy lugs and haven't seen them on thus model in my browsing, but I let the experts comment on that.
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