1938. No edition remarks. 198 pages. No dust jacket. Blue cloth with yellow lettering. Contains black and white illustrations throughout with a folded diagram. Pages remain bright and clear with minimal tanning and foxing. Pen inscription to half title page. Slight paper remnants to front free endpaper and white mark to rear pastedown. Boards have moderate edge-wear with bumping to corners and fading to surfaces. Slight crushing to spine ends with clear yellow lettering. Book has a notable forward lean.