A C.P Stirn Concealed Vest Camera Model I. Serial no: 5975 Date: c.1887 Body: nickel plated metal Shutter: rotary - working Lens: Periscope lens Optics: G Notes: in good original working condition, missing strap. Making six exposures on a circular glass plate, This camera was designed to be worn against the chest with the lens poking through a buttonhole, it was a major commercial success. Literature: A History of Photography in 50 Cameras - Michael Pritchard