Very few Model 1913 pistols would have been marked by paramilitary groups or organizations of this period. Usually this marking is no more than a series of numbers above another series of numbers, such as 23 over 12. These are found usually on the left side of frame next to left grip. Most of these numbers are indicative of property numbers assigned to a particular pistol belonging to a particular SA Group, Stahlhelm or right-wing organization such as Red Front (early communist). Any pistol of this type should be examined by an expert to determine if it is an original example.