German WWII NSBO Athletic Shirt Insignia

German WWII NSBO Athletic Shirt Insignia-The NSBO, 'Nationalsozialische Betriebszellen Organization' (National-socialist Industrial-cells Organization), acted as the NSDAP's alternative to labor unions and communist worker groups in industrial factories. Officially a national organization, the NSBO was concentrated in the heavy industrial centers. The NSBO was absorbed into the DAF in October of 1934, and ceased to exist in March of 1935. This insignia is black and white BeVo on a white disc. The insignia is in the form of a hand holding upright a hammer with a static swastika to its head. It has a partial cogged wheel proceeding to the left, the 'N.S.B.O.' is in white. There is some slight discoloration, but this is very rare and in very good condition.