The Key camera. Manufactured by the Platinotype Co. For 3 1/4 x 4 1/4 plates. Box form magazine camera. RR type lens F.6". No aperture adjustment. Double V shutter with uncalibrated tensioning screw for varying speed. Screw focussing. Shoes for clip-on viewfinder (missing) with two spirit levels.. Special Key plate carrier contains two unmounted plates in turn allowed to fall into slots at camera back, returning to carrier after exposure.