Its not a Button or is it?????

[nova]

It's not a Button or is it??

Found this today any ideas what it is? The back is smooth it's tad bigger than a quarter.

 

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[oldfireguy]

Re: It's not a Button or is it??

I believe it's a WW1 era collar disc. The stud on the back is missing that attached it and I can't tell for sure what the letters are inside.

 

[RelicHunter97]

Re: It's not a Button or is it??

The picture is upside down and the letters are U,S,A,N

 

[fyrffytr1]

Re: It's not a Button or is it??

Maybe USNA? United States Naval Academy?

 

[kuger]

Re: It's not a Button or is it??

I had mine IDed on here,and I beleive it had something to do with Pre Army?