There does not seem to be much information available about this line of cameras. The Onix is a Contessa-Nettel box camera which was remaindered out during 1926-27. It had a sportsfinder, T & I shutter, and an f/12.5 lens. It was available in 6.5 x 11cm and 6 x 9cm sizes. I would hazard to guess this is a fairly scarce camera.