Centering55/45 or better on the front. 70/30 or better on the back.
CornersCorners are mostly sharp with very slight wear at the tips. Imperfections are barely noticeable without magnification.
EdgesPerfect edges under normal inspection. Any tiny imperfections are barely visible under close magnification. Edges are sharp and clean.
SurfaceNear-perfect surface with only the tiniest imperfections visible under close inspection. Surface appears clean and free of noticeable marks.