1941. Second Edition. 88 pages. No dust jacket. Black boards with gilt lettering to spine. Black and white photographs and diagrams throughout. Binding remains firm. Crinkling to gutters. Pages remain bright and clear with minimal tanning. Boards have mild edge wear with slight rubbing to surfaces. There is bumping to corners and crushing to spine ends. Tanning to spine and edges. Gilt lettering is darkened and faded. Boards are bowed.