1948. No edition stated. 200 pages. No dust jacket. Red paper covered boards with green cloth spine. Black title label to front. Includes various diagrams. Pages have slight foxing, tanning and minor thumbing. Foxing more noticeable towards the start and end of the book and on text block edges. Previous owner's inscription and sticker to front pastedown. Boards have some moderate edge wear, with slight bumping to corners and minor bumping to spine ends. Boards a little rubbed and marked overall. Boards are slightly bowed. Several minor dents to board edges.