N.S.B.O membership pin

Reichsbetriebszellenabteilung wchich stands for German Reich Factory Cell Organization of the Nazi Party.
After all non-Nazi trade unions were outlawed by decree on 2 May 1933, the NSBO became the only official workers' organization in Germany. This moment of glory, however, was short, for the German Labour Front  (DAF) was established a few days later. More organized and better represented at national level, the DAF ended up absorbing the NSBO in 1935