NM - Near Mint : Like Mint but very light aging or very slight discoloration from being in an album for many years.  Not as sharp or crisp.

PR - EX - Excellent : Like mint in appearance with no bends or creases, or rounded or blunt corners.  May be postally used or unused and with writing and postmark only on the address side.  A clean, fresh card on the picture side.

ZG of VG - Very Good : Corners may be a bit blunt or rounded.  Almost undetectable crease or bend that does not detract from overall appearance of the picture side.  May have writing or postally used on address side.

G - G - Good : Corners may be noticeably blunt or rounded with noticeably slight bends or creases.  May be postally used or have writing on the address side.

FR - FR - Fair : Card is intact.  Excess soil, stains, creases, writing, or cancellation may affect picture.  Could be a scarce card that is difficult to find in any condition.