Unknown camera, 120 film, curtain shutter, Zeiss Jena Tessar lens, drop down prism. Possibly a prototype? I have no idea what type of camera I have. It is by far the coolest camera I have ever put my hands on. To the person who can steer me in the right direction, or by any chance possesses knowledge about this camera will have my sincerest thanks. Please view all images. To get the camera into shooting position, the front bed drops down, then pulled out from the body, then the lens extends on a rail with a stop at the end. Once the lens and body are extended, a switch directly above the lens is moved from one side to the other, which moves the small prism in between the lens and film plane, and can be viewed (not very well) through the small viewfinder on the top of the body.