Button or cap of some sort?

[sshafer11]

Found this in the backyard of a house built around 1900. It is the exact same size as a penny and the edges are curved back like a bottle cap. There is no hook or anything on the back. As the picture shows it says "The Winner" and shows a locomotive. Any ideas?

Thanks!

 

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[CASPER-2]

LOOKS LIKE A BUTTON OFF A PAIR OF OVERALLS