I have a very basic Coronet Captain box camera among my collection that I'd like to put some film through; it takes 120 film and produces 6 x 9 cm negatives. The camera has a fixed aperture lens and only one shutter speed (plus 'time'). Can anyone tell me what focal length and aperture the lens is, and what the shutter speed is. That way I'll have an idea of what speed film to try in it.

Thanks in advance,

Alan