Pulled off a good one, I think. Got some Scotch Brand #111 Double-Sided Foam Mounting Squares at the hardware store. Cut a circle of the stuff about the size of the black area on our new coin and stuck it on the back of the coin. Then stuck the coin on my Harley, looks like a medallion. It's on there good and secure. The foam is set back from the edge of the coin so you can't see it, and the coin looks like it's floating a little above the surface. Not bad.

Somebody could probably get a knife blade under it and pry it off, but who'd be crazy enough to try that? A coin isn't worth dying for, even a 119th coin.