U.S. Army Signal Corps PH-501/PF made by Simmon Brothers, Inc. in Long Island City, NY. This camera is a 2 1/4 x 3 1/4 format and are usually dated 1943 from the nameplate on the side of the camera. An additional lens that comes with the Combat Camera is a 9in. Ilex Paragon f6.3 telephoto. This camera is was mostly used in the South Pacific because of the harsh weather.