This was the first 16mm camera, introduced in 1923. It was a rectangular cast aluminum box approx.
Was cranked by hand at two turns per second to achieve the necessary 16 frames per second. That a tripod was essential while allowing varying speeds & single frames to be taken. In 1933, the Cine-Kodak Special was introduced for advanced amateur & semi-professional work, & quickly became. Popular with professionals for its vast range of capabilities.