It may have been refinished, but if it has, it is more of a high quality restoration than your average refinish job. Usually a refinish isn't that crisp and uniform overall, and the fact that it has an interior that is in the same state of preservation as the exterior indicates it is an original or an expert restoration. I wouldn't write this one off too quickly. I would be much more satisfied if someone that knows Lugers well could examine this one in hand and not try to assess it from photos on a computer screen. It is a relatively scarce variation and deserves careful scrutiny. I agree with tac (even though I am not a real big fan of these "repros"
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