Mint: no defects of any kind; full cover gloss; sharp corners; clean shiny staples, centred at spine; no printing or binding defects. Literally as new.
Near Mint: no obvious defects; high cover gloss; no fading; covers flat, centred and unworn; spine flat and tight; interior pages clean and white. Permissible defects: slight stress by staples; minute corner creases; small binding or printing faults.
Very Fine: several minor defects; good cover gloss; minimal surface wear; near flat cover; small corner creasing; very minor corner, edge, or spine wear; slight staple discolouration; up to half and inch (13mm) light cover crease permitted; interior paper may be off-white.
Fine: no major defects but an accumulation of minor ones, including corner dings, minor creases and light spine wear.
Very Good: medium general wear; no pieces out (although a small missing corner piece is acceptable); minor tape repair; crosswords and mail coupons filled out.
Good: complete; readable; badly creased; rusty staples; small pieces may be missing; interior pages may be tanned but not brittle.
Fair: very badly worn; missing pieces but no missing pages; dark tanning, near brittleness.
Poor: curiosity value only