Luger Identification Help—1925 9" Barrel

[owutfun]

Hello!
I am the owner of a P08 Luger with a 9" barrel, however I'm not 100% sure about the value of the gun as the previous owner had only limited information about it.

It is a 7.65 caliber and I think it has a replacement Stoeger barrel of its approximate vintage, though I'm not certain of the year it was made. I know that the previous owner purchased the gun in '52 and he identified it as 'a 1925 commercial model and the barrel had been/was replaced at that time.' My gut feeling is that it may have been a 4" barrel originally, but I was hoping someone could shed some light on that matter since I have no confirmation of this. I was able to identify the lettering on the leading edge of the trigger guard as a "o" and as a German Luger.

I have attached several photos of the gun with the markings included. You can see in two photos the 'o', along with a serial number and a 'DWM' crest on the top of the gun. Additionally, there is a '26' stamped on the sight, which cannot be seen in the photos.

I'd appreciate any information anyone can give me on this gun. I've searched online and through several forums, but because of the uniqueness of this Luger, answers have been hard to come by.

Also, I'm wondering if anyone has an idea of how much it's worth. Please let me know if you have any ideas!

Thanks,
RJ