Foreign Made U.S. Eagle

Could be some type of Generals Aid insignia like the 1903/05 insignia, this one is clutch back and marked "K.G. Luke Melbourne Aust." The detail is very fine with nice gold finish. Eagle is about 1-3/8 inch tall and about 1-1/4 inch wide. Could also be for Officers Campaign hat. Very fine quality with light age. Exc. + $40.00 RARE