I finally found a site that had some Overstreet grading standards. It shows 3.5-4.5 may be detached at one staple. So I was in the ballpark.
Thanks to all for the responses.
That would seem to be for a cover rather than a centerfold, no?
This is the text I quoted from. I confirmed it in my copy.
VERY GOOD (VG) (ONE 3.5-4.5): The average used comic book. A comic in this grade shows some wear, can have a reading or center crease or a moderately rolled spine, but has not accumulated enough total defects to reduce eye appeal to the point that it is not a desirable copy. Some discoloration, fading and even minor soiling is allowed. As much as a ¼’ triangle can be missing out of the corner or edge. A missing square piece (1/8” by 1/8”) is also acceptable. Store stamps, name stamps, arrival dates, initials, etc. have no effect on this grade. Cover and interior pages can have some minor tears and folds and the centerfold may be detached at one staple. The cover may also be loose, but not completely detached.