UNCIRCULATED (UNC) : A perfectly preserved note, never mishandled by the issuing authority, a bank teller, the public or a collector. Paper is clean and firm, without discoloration. Corners are sharp and square, without any evidence of rounding, folding or bending. No light handling is present, no compromise, a perfect note. An uncirculated note will have its original, natural sheen. ABOUT UNCIRCULATED (AU) : A virtually perfect note, with some minor handling. May show very slight evidence of bank counting folds at a corner or one light fold through the center, but not both. An AU note can not be creased, a crease being a hard fold which has usually "broken" the surface of the note. Paper is clean and bright with original sheen. Corners are not rounded. EXTREMELY FINE (EF/XF) : A very attractive