The 531 is a folding camera in the Ikonta line, produced by the German company Zeiss Ikon.
It takes 16 size 4.5×6 cm images on 120 type rollfilm. The Super Ikonta’s are equiped with coupled rangefinders. It was produced between 1936 to 1953. It’s a 4.5 x 6 cm format on 120 type rollfilm.