I'm not exactly sure what era this one is, but I haven't seen this construction before. Eagle badge appears to be struck in solid brass and coated in black with a pin/catch attached. The pin is broken away but the catch remains (this style of pin reminds me of British-made US DUIs that I've seen). I also realize the WWII airborne eagle design has been used after WWII. Hopefully someone can help me identify period and manufacture of this one!
Thank you very much for any insight you can provide.