1950. First Edition. 78 pages. Orange and white jacket over paperback book with matching paper covers. Staple binding. Contains black and white diagrams throughout. Pages remain bright and clear. Binding is firm. Visible rust marks to last page and reverse of rear cover. Paper covers have minimal edgewear, with minor curling to corners. Spine is slightly creased with mild scuffing to ends. Unclipped jacket. Minor tanning to all surfaces. Heavy sunning and noticeably scuffing to spine, with visible water stain to inside. Minimal edgewear with light chipping. Noticeable marking overall.