I bought a coin from a reputable auction house. The coin was NGC labeled. Once received the coin I noticed that the holder looked as though it had been tampered with. I returned the coin to the auction house and indicated my displeasure with the holder. They said that they sending the coin back to NGC for re-holder. I got the coin back a couple of days ago with the new NGC holder that seems to be legit. How can I show this coin to an NGC rep to make sure it is the same quality coin that I bought in the auction??