Looking For a Little Help To ID This Button?

[milco]

My uncle found this over the weekend. Anyone recognize this flat button?
http://uploads.tapatalk-cdn.com/20161114/149320ec000a9754974ab0903f307d9d.png

[del]

Darren , I can only assume its a 1 piece type about the size and thickness on an indian penny or modern nickle ?