what are these?

[19BARBAROSSA41]

guy please help me and tell what are this. I know that item on the left is hook for drum (used by SA HJ DJ and maybe by Army ) but what are this metal oak leafs for ?? These are in bronze , silver and gold grade. Maybe someone of you will know something more about it?

[Theodor]

Similar Oak leaves were used in Austria, to decorate helmets. Maybe these are such? I hope Paolo would not mind using a little photo from his great book "Elmetti" /Helmets/.