Centering55/45 or better on the front. 60/40 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.
SurfaceAbsolutely perfect surface with no flaws, scratches, or marks. The surface is pristine under all forms of inspection.