http://cgi.ebay.com/1918-7-S-25c-NG...em2a0a4f52d5I've been looking at SL in holders and it seems in F to VF NGC and PCGS are all over the place. Why is this a 12? It's at least a 15 right? IT seems obvious to me, but may someone can explain their considerations here. I know the dates a bit weak, but the dates are weak up through AU sometimes on these coins.