1955. First Edition. No dust jacket. Blue cloth with gilt lettering. Contains black and white diagrams and photographs, some of which are folded. Front hinge is cracked causing board to be loose. Binding is shaky, however all pages remain attached. Front free endpaper removed. Pages are clean overall, with mild tanning throughout. Occasional thumb-marking. Boards have moderate edge-wear with bumping to corners and noticeable rubbing to surfaces. Mild tanning to spine and edges with some crushing to spine ends. Faint water staining overall. Book has a slight forward lean.