Wikipedia
Rottenführer
Rottenführer was a Nazi Party paramilitary rank that was first created in the year 1932. The rank of Rottenführer was used by several Nazi paramilitary groups, among them the Sturmabteilung (SA), the Schutzstaffel (SS) and was senior to the paramilitary rank of Sturmmann.
The insignia for Rottenführer consisted of two double silver stripes on a bare collar patch. On field grey SS uniforms, the sleeve chevrons of an Obergefreiter (senior lance-corporal) were also worn.