I'll start off with this one which is currently on eBay: It is obvious to specialists that this is a Reverse of 97. With a little research, it is shown to be S-126. The big mistake which might be made is that quickly looking at the obverse and thinking it is accurate when identified as a Reverse of 95 and a plain edge, you would jump to the conclusion that it is either the NC-1 or the S-121a, both of which are R7 ish in rarity (the only common plain edge (S-120a) Reverse of 95/96 being significantly different in the location of the HWH.) The obverse is very close to the NC-1. So this mistake could create a significant difference in value in the mind of those who trust the slab. ps. I'm wondering if Sheldon Obverses 1 and 6 may be like some others Breen concluded to be different die states/stages of the same die after reworking. If so, I would suspect NC-1 to follow S-126 explaining sharpening of the B and weakening of the 1. pss. Nope, the NC-1 has 5 dentals between the center of the upright of L and center of I while the S-126 has 4 such dentals. Close, but not the same.