A + : Excellent condition, close to new. Flashy colors.
A : Very good condition. Flashy colors. No lack. A slight defect is accepted.
A - : A good condition but some minor defects which may be visible: small tears, pin holes, slight coloring of the paper or visible folds. May contain traces of restorations.
B : In good condition. Slight visible defects such as traces of folds, damp spots or slight losses restored. Fair overall appearance.
C : Fair condition but lacking or significant restorations.