that Luger, along with the P-38, would fire modern 9mm Parabellum cartridges. In fact, the 9mm cartridge was developed by the Germans for the Luger pistol design.
The german sub machine guns of the period MP38 and MP40, also were chambered for the 9mm cartridge.
The .45 caliber US M3 “Grease Gun” had a conversion kit to allow it fire the German 9mm Parabellum cartridge.
Around 1987 a whole lot of Lugers were imported. I read somewhere that they came from Russia but am not sure.
I had my neighbor who was a dealer, order one for me. It was described as excellent with non matching numbers. When it arrived I was pleasantly surprised. It was in excellent plus condition and all numbers except the mag did in fact match.