No Edition Remarks. Unpaginated. No dust jacket. Blue cloth with gilt lettering to spine. Complete set of 40 data sheets. Folder pockets are heavily thumb-marked and moderately tanned, with visible glue residue present. Fraying to cloth edges. Data sheets are noticeably tanned, with minor dog-eared corners, and slight tearing to curled edges. Prominent thumb-marking throughout. Boards have moderate shelf-wear with notable bumping to corners and rubbing to surfaces. Moderate tanning to spine and edges, with visible crushing to spine ends. Gilt lettering is bright and clear. Liquid drops on front and rear boards, with prominent bowing.