Conway colour-filter model

This was made by Standard Cameras Ltd, a company based in Birmingham between 1931 and 1955. This camera appears to date from about 1950. It has a single shutter speed, and B (labelled as time), fixed aperture, two focus positions, near and distance. It has separate viewfinders, with individual covers, for vertical and horizontal pictures (8-on 120 film). The filter in its name is a green one which can be set on or off.