OK...Let me see if I can remember this correctly. Maybe Joe can help if I screw up. According to a collector friend of Bill Stump's, it was a pin to signify a member or commander of a gun crew on the early armed merchant marine ships. These ships were a part of the KDF fleet and were not supposed to be armed. As you can see its a pretty obscure pin. I did copy the info down when Bill posted it and if I find it I will check it to be sure.
