1928-1938. 120 film camera. Metal box with leatherette covering. Doppel-Objektiv lens. Several changes during the years: reflex finders are in top-left corner, handle is c-shaped on the early models (1928); near/far focusing switch on front, handle with metal brackets and finders are on top on the later models (1931); time exposures shutter on the later models (1934). Color versions starting in 1931.