Vintage Large Silver Tone Black Enamel Flying Eagle Unisex Brooch

This fabulous vintage pin is of a flying eagle brooch is fashioned in a silver finish with black enameling. The brooch measures 4 1/4" in length by 3 5/8" in width which would make it perfect for a unisex pin. The only mark I can find is what looks like Mitchell 88 on the back side. In great condition!