Item is a plastic stereo camera typically found through mail order catalogues. For 4.5 x 5 cm exposures on 127 mm roll film. Shutter speed 1/50. Twin f11 menscus fixed focal lenses. Lens are labelled as 1 and 2. Written on item: Bioncular viewfinder patents applied for, coronet 3-D, present use 127 film, to take 8 picture close cover blase over No.1 lens make exposures on every number from 1 to 8, to take 4 pairs stereo picture open cover blase over no.1 lens. make exposures only on odd numbers (1, 3, 5 and 7), use no. 127 roll film.