This is a nice 3rd model NSBO members pin ('National Sozialistische Betriebszellen-Organisation' Mitgliedsabzeichen). The NSBO was a workers organization in Germany, established in 1928. In 1935 the NSBO was merged into the DAF, a more organized and better represented organisation. The pin is 'ges.gesch' marked on the back. A small tip of the pin is missing. Nice example in used condition!