Info about a Luger

[Beretta1984]

I recently acquired this Luger and am looking for any information about it. I am a fan of World War II memorabilia so it meant a lot to get my hands on it. I know the customs papers don't increase the value much (if at all), but it made it more desirable for me as an historian. It's kind of neat to have 2 papers about the medic who brought it back with him - the serial number of the pistol (4348) is also listed on the paperwork - along with the medic bringing back "dental forceps"!

All parts internal and external have matching serial numbers. The magazine does not match, but is from the time period. From the pictures, obviously someone carved an "M" in the grip. A Luger collector checked out the bore, etc and classified it around 83%. Can anyone help with history, approximate value, etc? Thanks!