The SS (Schutzstaffel): Scharführer
Scharführer is most recognizable as a rank of the SS and title of the SA. Scharführer was first used as a title in the Sturmabteilung as early as 1921 and became an actual rank in 1928. Scharführer was the first NCO rank of the SA, and was denoted by a single pip centered on a collar patch. In 1930, veteran Scharführers were appointed to the new rank of SA-Oberscharführer, denoted by an additional silver stripe to the Scharführer collar patch.
The SS originally used the same insignia for Scharführer as the SA, but this changed in 1934 with a reorganization of the SS rank structure. At that time, the old rank of SS-Scharführer became known as SS-Unterscharführer with the title of SS-Scharführer becoming equivalent to an SA-Oberscharführer. The rank of SS-Truppführer was removed from the SS, to be replaced by SS-Oberscharführer and the new rank of SS-Hauptscharführer. The early Waffen-SS created an even higher rank, known as SS-Sturmscharführer.
Within the SA, Scharführer was senior to the rank of SA-Rottenführer while in the SS, a Scharführer was senior to that of SS-Unterscharführer. The rank of Scharführer was also used by some lesser known Nazi Party organizations; among them the National Socialist Flyers Corps (NSFK), National Socialist Motorist Corps (NSKK) and the Hitler Youth (HJ).
Sources: Wikipedia; Picture courtesy of: U.S. National Archives