What is this button?

[CAP]

Hey There everybody!
Dug this button/badge? at an old school site.
Appears to have a snap device like to hold it onto hat, clothes, uniform etc.
Any ideas?
CAP

 

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[midnightskirmish]

A navy pilot button of some sort?

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[jewelerguy]

WW2 US Army Air Corps collar disc

 

[CAP]

thanks everybody!

 

[TheCannonballGuy]

If you want to learn more about correctly identifying US Army collar-disc insignia, and time-dating them, here's an excellent educational webpage:
Dating Metallic Insignia: Collar Disks

 

[Anduril]

Wings and propeller.
I am wondering if the propeller is there to distinguish it from jet aircraft?

 

[13dolphins1]

If you follow the link provided above you will see one that is similar but not smooth around the plane or bird dates to early 20. Then down farther one that is smooth like yours dates to wwII

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