Need an ID on this military button

[Wallhangers]

I know it is probably not real old because of the propellers showing on this, but could someone tell me specifics on what the A L A means and an approximate age? It measures 7/8" x 7/8". Thanks,

 

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[nhbenz]

At a glance, seeing the wings and propeller I thought "Army Air Corp", but now that I opened my eyes and noted that the whole eagle is there (not just wings)... I dunno'.

 

[ivan salis]

"props and wings" is a term used by a air force rotc (maxwell air force base in alabama) *

 

[DCMatt]

My first thought was civilian airline or airport uniform button - not military. 1920's 0r 30's. But I'm just guessing...

Can we see the back?

DCMatt