The body had an unusual "portrait" format rectangular shape, with a short, wide-diameter lens barrel containing the CdS meter photocells window around the 28mm lens. Rotating the lens barrel set the speed of the Seikosha shutter; the aperture was set automatically.
There was a cylindrical handle at the bottom, which also wound the clockwork mechanism. " -from Camerapedia.
Hadn't seen this camera, or any 1/2 frames before today, they seem to have quite a following. Take 1/2 frame shots, 2 to a print, then some nice juxtapositons are achieved. Started on this after finding Jacob Holt's huge photo essay on American poverty and race. Further reading. Some intense stuff.
Plankskate via flickr.