I am thinking that this maybe a class ring, I have contacted Notre Dame lost and found, I hope to find the owner. It had "Belfour 55 stamped inside. I just hope that is a name and not a jeweler.The coin is odd I have never seen one. I also found about $4.00 in change.I was happy. I would like to give my Xterra-70 credit for this but it is in the repair mode, I borrowed a tessoro Sidewinder u-max, I guess it was the first of the u-max line. I liked the u-max and am looking for a used Tessoro as a back-up or a visitors unit.