The K-20 (K20) is an aerial photography camera used during World War II, e.g., from the Enola Gay's tail gunner position of the mushroom cloud over Hiroshima. Designed by Fairchild Camera and Instrument, approximately 15,000 were manufactured under license for military contract by Folmer Graflex Corporation in Rochester, NY between 1941 and 1945. It is in working condition and had got a service. The K-20 uses a 5.25 x 20 to 5.25 x 200 foot Roll Film, with an image size of 4x5 inches. Lenses were 6 3/8" f/4.5 with an adjustable diaphragm and were non interchangeable, these were made by Kodak, Ilex, or Bausch & Lomb, as available at the time of order. The camera featured the use of a vacuum to keep the film flat. Complete With accessories. What you see is what you get !