Case back seamaster logo?

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Saw this case back on sale from a watchmakers deceased estate at a local auction and took a photo prior at pre auction inspections
It appeared new to me but I was more concerned of authenticity of seamaster logo! What are your thoughts?
 
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Without knowing the reference it's hard to draw any conclusions. How about the rest of the watch for context?
 
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Thanks for commenting! It was not the complete case, but just the case back that was in the lot! I was a 165.009! It was the hippocampus sea emblem that caught my eye as I have only seen ones on eroded case backs!
 
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I thought I had deleted it but after looking through photos, I found the inside of the case back! Hope this shows more information, but as I said it was the only case back that was there ! Nothing else! That is all the information I have! Thanks!
 
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Google the reference above adding site: omegaforum.net

This will likely bring up plenty of threads for comparison.