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. There is a data plate on the top of the camera with contract and manufacturer information: The Folmer Graflex Corporation Rochester New York Type K 20 Serial No. USN 43-3715 Contract No. N288s-11028 Specification No. 106 This camera is offered in very good condition. It comes with an original case, two filters (red, yellow). 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. This example has an Eastman Kodak marked lens. The camera featured the use of a vacuum to keep the film flat.