1965. First Edition Thus. 235 pages. Pictorial jacket over blue cloth with gilt lettering to spine. Contains black and white diagrams throughout. Pages are lightly tanned, but text remains clear. Binding is firm. Inscriptions to front endpapers. Boards and spine have minimal shelf-wear, with mild corner bumping and crushing to ends. Spine is slightly sunned. Gilt remains bright. Unclipped jacket. Light tanning and foxing to all surfaces. Panels have light edgewear, with small tears, chips and creases, heavier to spine ends. Moderate rubbing to exterior.