This item is the reverse side of an archival photograph, bearing only a handwritten notation, 'P-40 N,' identifying the subject of the corresponding front-side image as a Curtiss P-40N Warhawk. The P-40N was the most numerous variant of the P-40 series, a rugged single-engine fighter that served the U.S. Army Air Forces and Allied air arms extensively during World War II, particularly noted for its service with the famed 'Flying Tigers' in earlier P-40 variants. Project: 218470