I got the exact coin shown above from my local coin dealer just before Christmas. He just gave it to me. Said it's in too bad of shape to sell. After I looked at it, I knew that it would make an easy and nice looking coin ring to craft. You see, it is so old, that is was quite thin, making it easy to burr with my Dremmel tool. And the stamped "NAPOLEON III EMPEREUR" was very legible, so it would still be identifiable on the finished coin ring, provided that I didn't polish it off.
Below is the finished coin ring. Thanks for looking.