M1900 DWM Bulgarian Luger

[gibsonj30]

Hello,
I have some questions concerning this pistol. It belongs to a family member. It is an M1900 DWM Bulgarian Luger. It was brought back during WWII by my great uncle. According to the story in the family, my great uncle was an MP and took this pistol from someone at Dachau (originally, I heard it was an officer, but everyone's luger came from an officer ). The pistol is in the original 7.65 parabellum. It has the original magazine and a 1922 flap holster. All of the numbers match-including the barrel. Is there anyway I can check to see if this pistol was rearsenaled? Is there a premium for a pistol that is in the original 7.65? Is it Kosher to post serial numbers?