Potomac Flying Services Washington D.C. Airplane Tour c.1935 vintage ad brochure(Old Books, Americana, Vintage Advertising, Washington D. C. National Landmarks, Airplane Tours, Illustrated Advertising). Fly Over Washington, D. C. Published c. 1935, South Washington, Virginia by Potomac Flying Service Inc. Folding aviation promotional brochure. Text in English. Illustrated throughout. Publisher's pictorial paper wrappers, an oblong single sheet multi folded into 3 panels printed on both sides. Item is old and shows some signs of