1965. Second Edition. 176 pages. Pictorial jacket over blue cloth with silver lettering to spine. Contains black and white diagrams throughout. Pages remain bright and clear. Minimal foxing to endpapers. Binding is firm. Previous owner's inscription to rear free endpaper. Boards and spine have minimal shelf-wear, with mild corner bumping and crushing to ends. Silver is bright. Moderate sunning to head of spine. Unclipped jacket. Light tanning to all surfaces, heaviest to spine and edges. Moderate edgewear, with noticeable chipping, tearing and creasing, and slight loss to spine ends. Mild marking overall.