Subminiature camera pretty Made in England (ca. 1936) United Optical is the Merlin. This is the version in blue finish, one of the rarest colors. very small cameras with metal body and single shutter (speed). Its dimensions are 46x35x46 mm around. Uses a special film roll with a size of about 20x20mm negative. Merlin is a subminiature camera molten metal using a special roll film 20 mm. A roll of film frames produces seven 18x18mm. It was manufactured by United Optical Instruments of Southend-on-Sea, England - possibly in the late 1930s has a single shutter speed and f / 16 lens fixed focus. The body has a viewfinder frame folded up, and is finished with a crisping paint, available in red, blue, green and black. Merlin was used (without the finder frames) as the bowels of the chamber of the gun ERAC mercury.
