In an episode of Ross Scott's game Dungeon he played an arcade game called Carnevil:
1:12 "I'd love to have a coin minted that looks like this."
Well, I can't mint, but I can print it.
In order to get the details to print on the back you'll need to use a slicer that can do single walls. The current version of Simplify3D couldn't handle it, I had to use Makerware to get a good print.