1920s commercial wartime .30 luger

[chevy]

One of my dear friends ( gunsmith and former special forces officer) purchased a .30 commercial Luger that was suppose to have been captured in the European Theater of the war. With this pistol was a P38 wartime pistol and holster, a pair of German binoculars with case and a US fighting knife. The Luger was in excellent shape with original nickel plated unmarked wooden base magazine. The Luger also had the GERMANY export mark on the frame. I will send pics as soon as possible. My question to you fine people in the forum would a German officer or enlisted personnel use a .30 Luger ? . It seems highly unlikely to get .30 Luger ammo during a wartime situation. Any other forum members know of captured commercial Lugers? The captured pieces have some paperwork of where and when they were captured.