Madelette postcard camera (one minute camera), box type for 2 1/2 x 3 1/2 inch reversal cards. Fitted with a meiscus lens of fixed aperture and focus. B shutter, two sprung leaves. Folding optical frame finder. Hinged holder inside camera for pack of sensitised cards. Loaded through black cloth sleeve on camera back. After exposure cards were lowered into a developing tank attached to camera bottom (missing). The Chicago Ferrotype Company. 1913