Material: Plastic body with chrome and aloy fittings. Shutter speed B and I Subminiature camera that makes exposures of 14x14mm on 16mm filmbut is in fact the same as 17,5mm film. The Septon Penletto has a mechanical working pencil inside. A pen shaped spy camera. The Septon Penletto camera appeared in 1953 and has a working mechanical pencil built in. Marketed by the Japanese firm Harukawa Trading Company, the Septon Penletto has a fixed focus lens, a single speed shutter and bulb position and the name Penletto on the camera front. The shutter release is a button on the left side of the camera, the button lower left is B/I and the cocking lever is lower right. Very rare name variant of the Septon pen camera for 16mm film, except for a small chip on the back of camera in fine original condition, supposing only less than 5 of these cameras are known to exist. The device has the shape of an oversized pen. The tip contains a functional propelling pencil. The other end contains an eye-level viewfinder, and has a pen clip on one side, engraved SEPTON. The camera part is in the middle of the device. The exposure size is 14×14mm, and the film is sometimes described as paper-backed 16mm film, perhaps because it was advertised or announced as such. It seems that it is actually the same as the 17.5mm film used in Hit. The back door is removable, contains a window to control the position of the film, and is inscribed PEN CAMERA and perhaps MADE IN JAPAN below. The advance knob itself is placed opposite the pen clip. The front part of the camera is metal finished, with a fixed-focus lens in the middle. The exact details depend on the camera version.