Keystone Model A12 16mm cine camera. Clockwork-driven with running speeds of 10 (low), 16 (normal), 24 (sound) and 64 frames/second (slow motion), together with three 'intermediate' speeds. It can also take single frames. The button can be locked into its 'on' position. The camera takes 100 foot daylight-loading spools of 16mm film and has a double sprocket drive. The twin-lens turret has a f/2.5 Keystone Wollensak 1 inch Cine Raptar lens and a Dallmeyer 3 inch f/3.5 telephoto lens, in interchangeable C mounts. Each has an optical sight for the direct vision optical viewfinder that is brought into place as the turret is turned. On the side is an exposre calculator. Serial No J-3430. Keystone, Boston, Mass. With leather camera case and instruction manual dated June 1949, 44pp.