Need your Help

[Pre-64]

Had a buddy ask me to help him out today. He tore this old Pistol apart he has and could not get it back together. So I meet him at the gun club and proceed to get it operational again. Upon flipping the gun to check it out I notice the make: Waffenfabrik Mauser A-G Oberndorf A.N. Mauser is what is stamped on the slide. Oppisite side of the slide is stamped Cal. 7,65. So now I ask to see the old holster he pulled it out of. Scratched into the flap is M.W. Grube right above an Eagle with spread wings holding a Swastika. Obviously this is German War issue. Can anyone tell me anything about this Side Arm?