The Helicopter and How It Flies (Without Formulae Series) by John Fay
1967. Second Edition. 138 pages. Pictorial dust jacket over red cloth. Black and white photographic plates and illustrations. Minor foxing and tanning to pages and plates. More prominent to text block edges, pastedowns and free endpapers. Mild creasing and staining to hinges. Binding remains firm. Boards have minor corner bumping and edgewear with mild sunning and scuffing overall. Spine has slightly heavier sunning with soft crushing to ends. Book has a slight forward lean. Unclipped dust jacket with minor rubbing, chipping and tearing to edges. Moderate foxing, tanning and scuffing overall.