I remember a dealer, who sold one or two of those stick pins in past, offered them as early NS sympathy stick pins. We know the skull symbol and the motto "Und Doch!" were used by Freikorps members of the Eiserne Division. The question is, when were the stick pins made? Pre or after 1933? The swastika means not, that it must be made after 1933. And who used that kind of stick pin? Photos show us, that veterans used the symbols on flags during the Weimarer Republik.