Pictures of a WW2 Gun Camera or Camera Gun, Can you tell me about this gun.

Vintage Military Bell & Howell U.S. Navy Mk8 Model "O" Gun Camera. It is made of heavy metal and was installed in the fuselage or wings designed to operate when the aircraft guns were firing. It provided a filmed record of targets fired upon. This camera has a crinkle black paint finish. It has a post manufacture eye piece attached so it can be used as a hand held camera. Many of these cameras were remanufactured this way for consumer use. The Camera operates at 16 32 or 64 frames per second. The Lens is a Bell & Howell Ansix Type -V 1 3/8" (35mm) f/3.5 lens serial number 382275. I think this was manufactured in the 1950's.