http://www.ebay.com/itm/281437071306 For sale is a strike-through error on the reverse of a 2013 Silver Proof Dime from the US Mint Limited Edition Silver Proof Set, mint marked with an (S) for San Francisco. Rather than send it in for grading, I'm putting it up for auction here and we'll see who the lucky winner is so they can make their own choice of what they'd like to do with it. From the Mint Error News site on Proof Errors-- "Proof Errors Proof coins are struck by technicians who hand feed the blanks into special presses. They are produced, examined, and packaged using extreme quality control. It is very unusual to find major proof errors. A few broadstrikes, off-centers, double strikes in collars and off-metals have been known to be found in sealed proof sets. Proof errors are aggressively sought after by many error collectors."
