WW2 U.S. pin????

m85xxx

New Member
I have a few U.S. circle pins..
The one has a silver looking circle back but a gold looking "U.S."
Why would this be? It has a screw thing on the back and the words G23.
Is this WW2?
For some reason I can't attach attachments so no pictures..
Any ideas? Any websites to help me identify my pins?
Thanks!
 
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