Centering85/15 or better on the front. 90/10 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 to moderate wear along the edges. Chipping & nicks are visible upon inspection, but edges are still generally clean with light to moderate wear.
SurfaceClean surface with minor handling wear, such as light scratches or small marks visible under magnification.