Can you please tell me the make and model of the gun?
Is there any writing on the gun?
Can you get a close up photo of the lock work/metal parts?
Ok let me review these....
Based on just the photos alone, and in looking at the wear and tear on the metal work and wood, I would say that the gun "appears" to be real. An in-person evaluation by a gunsmith may be necessary to be absolutely sure. Its difficult to tell sometimes with photos alone.
Let me look again..
The photos are fuzzy but I see it. Does the hole look round?
I'm not exactly sure what that could be from.
Perhaps the gun was mounted on something as a display piece?