This is the camera I used to take pictures shown in this gallery (Zeiss Ikon Ikoflex Ic). Zeiss made them between 1956 and 1960. The "Novar-Anastigmat" taking lens is only a triplet (Zeiss also made a version with a better 4-element Tessar lens), but due to the sheer size of the negative (60 x 60 mm square on a 120 roll film), it is able to capture quite a bit of detail. The upper lens is for the viewfinder only. I think these cameras were supposed to be poor man's Rolleiflexes, but somehow never really caught on.