That's cool! May I suggest that you never separate the coin from the planchet. You may want to submit them for grading/authentication sometime. Chris
Both NGC & PCGS will grade them. http://www.bing.com/images/search?q=blank+planchet&qpvt=blank+planchet&qpvt=blank+planchet&FORM=IGRE Chris
OK, I can see "grading" for type, like this but how on earth can a number possibly apply? What is there about this (below) that makes it a 62? Why not a 60 or 64? If a stamped coin had the defects shown it probably wouldn't grade (damaged/scratched). Once again, grading goes overboard.