Omega Watch Hallmarks: Case Marking ID Help

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Hi everyone, I’d like to ask about the hallmarks on this Omega watch. Does anyone know what these markings mean? It’s solid or plated

 
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The "Crown 14K" mark is unusual.
It should either be "Crown 585" or simply "14K".
It could also be a case makers mark for a nationally produced case (not Swiss made).

Open the case and take a clear photo of the inside of the caseback to clarify things.