Twin lens reflex camera for 620 rollfilm 2 1/4 x 2 1/4 inches (modified). Fitted with a Tessar lens F: 7.5cm, f/3.8-32 No.980689. Viewing lens, Heidoscope anastigmat F 75.3cm f/3.1 No.22202. Compur rimset shutter 1/2/5/10/25/50/100/300/B/T. Rack and pinion focusing. Hooded reflex focusing screen (spirit level missing). Sports finder in hood, metal mirror for eyelevel viewing. NO.22520. Francke and Heidecke. c.1930.