The commercial Luger was manufactured in Germany for the German populace. They did not have Germany stamped on the barrel or frame. If the commercial Luger had Germany stamped on the barrel/frame it meant it was imported from Germany. A lot of the non stamped commercial Lugers found there way into the German military by way of the men using there personal non issued Luger. If you have an non stamped commercial Luger it would be worth more.