I have a J.P. Sauer & Sohn 7.65. I have researched some of this and know there are several variations of this model. M30 Behorden, 1913 or 30. What I've gathered so far, what I have is a model 1930 version, Included are two pictures, please note that all the pictures I've looked at have the letter S under the barrel stop, mine is R, anyone know why the difference? I do not have any nazi type indicators, all having the letter N with the crown, plus, on the left side of the barrel is the name Joh. Munts-Amsterdam next is a figure of a man holding what looks like a long spear type weapon or club and to the right of that the cal. 7.65. Any information on exactly the date of this weapon, its use, and any other info would be greatly appreciated.