Help with identifi US military button

[xindl]

I found this button at the town of Jihlava (CZE), can anyone identify it?
Našel jsem tento knoflík u města Jihlava (CZE), dokáže ho někdo identifikovat?
Thanks!

 

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[planejet42]

It's from WW-I. I found one just like it before.

 

[xindl]

I am interested in the inscription on the back, you do not know what was written there?

 

[jeff of pa]

If you Havn't yet,
post this button in What is it.

Somone may be able to tell you there

 

[Walter]

I found this button at the town of Jihlava (CZE), can anyone identify it?
Našel jsem tento knoflík u města Jihlava (CZE), dokáže ho někdo identifikovat?
Thanks!

It's US Army button, look like from WWI, but , if you wish to know for sure, show us revers