PCGS describe the codes on their website and NGC describe their version of "Details" on their website. The following is from PCGS: No Grade Description 82 Filed Rims 83 Peeling Lamination 84 Holed and Plugged 90 Not Genuine 91 Questionable Color 92 Cleaning 93 Planchet Flaw 94 Altered Surfaces 95 Scratch / Rim Dent 97 Environmental Damage 98 Damage 99 PVC Residue Overall I'm in favour of weeding out "Details" coins, and for that I think TPGs provide a useful service to numismatics. Doesn't mean of course that the coin won't subsequently be deslabbed and offered to the coin buying public without the "Details" accolade, but at least while they reside in their sarcophagai؟, the buying public are spared. Not to say of course that TPG slabs are not faked from time to time. What's that you say? Buy the coin, not the slab? Sometimes, on the other hand the rubric for some is, "Sell the slab, not the coin"¡!