Unmarked Silver IAB with flat back. A rather unique pin and hinge set up, something one would encounter normally on Luftwaffe badges, should make attribution simple for those medal collectors who recognize this particular IAB.
Silver IBA with solid back, slight vaulting and no maker / manufacturer marks. Identification / Attribution would be welcome, please feel free to comment with the manufacturers name.
An unmarked Infanterie Sturm Abzeichen with solid back. No clues as to manufacturer.