Aeroplanes in Detail, From the Original Drawings of JH Clark
This 1940's-era reference was reprinted from the publications The Aeroplane and The Aeroplane Spotter. Its 24 pages contain detailed technical illustrations of 11 WWII RAF and Luftwaffe aircraft and 2 engines by the famous technical illustrator JH Clark as well as photographs of each aircraft on fold-out pages 12 inch x ~17 inch each. Each illustration is a cut-away, revealing the internals of each aircraft or engine.
The cover shows wear, but the internal pages are in good condition given their age. See photos.