The average used book with all pages present. Books with loose bindings, highlighting , cocked spine , torn dust jackets , can fall into this category. There might be markings, but they do not interfere with readability. All text is legible but may be soiled and have binding defects. Reading copies and binding copies fall into this category.
All sizes are approximate.
4to, Qto. . . . . . 8vo , Oct. . . . Atlas folio . . . . Autograph document A.D.s. Autograph letter A.L.s.