Help with I.D. on old U.S. Air Force or Air Corp Wings Pin

[owilly]

Looks like a sweetheart pin.Something bought at the PX and given to a sweetheart or relative.Its based on a WW1 era wing design,

That is very interesting. Never thought of that. Thanks. Here's a picture of the back of the pin. There doesn't appear to be any marking on it, so perhaps it is a PX item?