Centering55/45 or better on the front. 70/30 or better on the back.
CornersModerate wear on corners, with fraying & chipping. Noticeable by the naked eye and more pronounced under magnification.
EdgesLight to moderate chipping, wear, & minor nicks visible under inspection. Edges remain generally clean and intact.
SurfaceClean surface with minor handling wear, such as light scratches or small marks visible under magnification.