This is a 1st Type SAAF Swooping Eagle finial, some have said these date back to just after WW1 and there is no actual proof of this but appear to have been worn up to the mid to late 1930's by some Officers possibly Aide de Camps. See officer on left.
I have only ever seen this one picture of it actually being worn, would appreciate more info or pictures. Feel free to contribute to this thread.
I purchased this one 2 years ago being sold as a "Imperial German Helmet Ornament" or so the label said .... !
Brian