I find it interesting that a PSA 7 Gray Back McMillan was on EBAY that was slabbed without stating it was a gray back and another PSA 7 McMillan Gray Back was in a lot that Lelands auctioned last September in an older slab without stating it was a Gray Back.
https://lelands.com/bids/bidplace?itemid=84328
What are the odds that two different Gray Back McMillan's both graded PSA 7 without stating such on the flip pop up within about six months?