Original with box WWII German Luftwaffe Revi 16B FL 52955 Gunsight one glass version. Its all complete, comes with original Reflective glass Fl. 52271, box and Incandescent lamp Fl. 32807. It was Installed in: e.g. Heinkel He 162, various night fighter versions. This gunsight was the main sight the pilot or gunner used when sighting targets (aircraft or ground).