Pin, Military/Polish Air Force insignia

Polish Air Force insignia made from gold-tone pressed metal (highly tarnished). Polish eagle at center with crown. Eagle has wings outstretched and is sitting on top of a small shield. Around each wing on outer edge is a section of geometrically decorated border. At top of pin, there is a cut-out section of the border near the top of the eagle's head. Faint initials of "LS" etched into lower shield.