Tom, thanks for the graphs and info. Great discussion happening here on this thread.
This is my ST 71. It's from a HG collection that I have mentioned before in this thread. I refer to as the Oakleaf PH collection. Anyway, the next issue, #72, from this collection graded out as a CGC 9.0 (highest grade). This a nice copy probably would grade out 7.5 or so due to some scuffing along top edge. Not sure if came right off the stand like this when the OO purchased it or just not ideal storage conditions over the years. My point being that what I considered the greatest PH collectionI have ever seen, other than the White Mountains, only produced this mid-grade copy.