PF, the Retina IIF isn't a folder, here is a quicky shot I took of it.
It uses a battery[I think?] it has a cap on the bottom that looks like a batt.cover?
It is a rangefinder and the spot is fairly clear after I got used to it. It has a needle that has to be centered between marks which are sort of liberal, by teeter tootering the shutter speeds and 'f' stops.
Kodak Retina IIF by
Tobacco Road, on Flickr