FRANKE AND HEIDECKE, BraunschweigA 6 x 6cm. Rolleiflex camera with a Heidoscop anastigmat f/3.1 7.5cm. viewing lens no. 448709 and a Carl Zeiss Tessar f/3.5 7.5cm. taking lens no. 1790556 in a Compur-Rapid shutter.