M (Mint) Perfect card as it comes from printing press. No marks, bends or creases. No writing or postmark. A clean fresh card.
NM (Near Mint) Like mint, but very light aging or very slight discolouration from being in an album for many years.
EX (Excellent) Like mint with no bends or creases, nor rounded or blunt corners.. May be postally used or unused, with writing & postmark only on address side. A clean fresh card on picture side.
VG (Very Good) Corners may be just a bit blunt or rounded. Almost undetectable crease or bend that does not detract from overall appearance of picture side. May be writing or postally used on address side.
G (Good) Corners may be noticeably blunt or rounded with slight bends or creases. May be postally used or writing on address side. Possibly some light toning.
AV (Average) Creases or bends more pronounced. May be writing in margins on picture side. Postmark may show through from address side but not on main portion of picture. Corners more rounded. Some cellotape marks as shown.