1960. First Edition. 726 pages. No dust jacket. Blue cloth. Contains black and white diagrams throughout. Pages are lightly tanned, but text remains clear. Binding is slightly shaky, due to cracked front hinge, but all pages remain attached. Clipped front free endpaper. Boards and spine have minimal shelf-wear, with minor corner bumping and crushing to ends. Spine and fore edge of front board are heavily sunned. Small visible dark marks to spine. Light rubbing and scuffing overall.