Definitely one of life's great mysteries.
However, one thing I did notice is that the Clemente is only miscut top-bottom. Left-right, it's still OC, but not so extreme as to be miscut.
Mantle appears to be miscut both top-bottom and left-right.
At the same time, I don't see why it shouldn't get a SGC 1. Then again, I've never submitted to SGC, so know nothing about their approach.
Could just be one of those charming idiosyncrasies that endears the TPGs that much more to all of us as the collecting public.
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Trying to wrap up my master mays set, with just a few left:
1968 American Oil left side
1971 Bazooka numbered complete panel
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