This is a coin with a cut out of the UK based on one by 'superdan' where he used Australia (http://www.thingiverse.com/thing:250991)

If you want you can use 123D to open the included file and add you own modifications or name to it. (A 0.5mm extrusion into the top of the coin around the UK cutout would look good for text.)

I have also made a similar coin to this with a USA cutout (http://www.thingiverse.com/thing:1532028)