1968 Shirriff Coins
I understand that there is a series of coins that are SP within the set and that New York and Oakland coins are somewhat scarcer than other SP's. What coins are the toughest? All of these or only 1 or 2. I haven't seen a guide that comments on this. At least in the US. I have seen some older threads that group these SP's into sections, but no guide.
Comments welcome. thx
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