When registering a type set, are points awarded for the rarity of the specific coins used, or are points only awarded for the grade of the coin used?
I don't know for sure about coins, but I would assume that they use the same parameters as the card registry. If you have an example of the top grade for that card, and it is the only card in that grade, it is worth 2 bonus points. If you have the top grade for that card, and it is one of several cards in that grade (again, none graded higher), it is awarded one bonus point. Someone with experience in the coin registry can hopefully confirm this, but that is how they do it with cards.