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.
EdgesNear-perfect edges with no visible imperfections under normal inspection. Only the slightest signs of wear may be visible under magnification.
SurfacePerfect surface under normal inspection. Any tiny imperfections are barely visible even under magnification.