'National Sozialistische Betriebszellen-Organisation' (NSBO) Belt Buckle (Koppelschloß). 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. Two-piece construction belt buckle, the plate is attached by two soldered spots, visible to the reverse. Also to the reverse is its raised buckle catch, and a prong bar with dual prongs, for the belt’s retaining tongue. Hard to find original buckle in good used condition!