Centering55/45 or better on the front. 70/30 or better on the back.
CornersLight to moderate wear on corners. Slight rounding & minor chipping is visible under inspection. Corners still retain their overall sharpness with some imperfections.
EdgesLight edge wear with light chipping & small nicks visible with the naked eye & under magnification. The edges are clean with no major imperfections.
SurfaceExtensive damage including deep creases, heavy scratches/micro-scratches, stains, and surface residue.