might have found a MS double die reverse

I bought this 1863 Indian from a antique store, it was out of an album. It looks to be at least a ms65++. also I was looking through "cherry pickers, this coin didn't have any of the symptoms for a 63 but it did have heavy DD on the right side of the shield and on the bottom of the arrows tips, continuing up the right side/outside of the wreath. Also there is a good size die crack on the obverse. What would make this a new die variety, and if so when I have the coin graded do I have to make any special arangments with NGC? Thanks