1950 Akarette II is a double viewfinder 35mm camera with interchangeable lenses. This is an early model with the strap lugs on the top plate instead of on the front and the front plate is held on by four screws in the corners.  A 75mm lens was offered as well as the Schneider-Kreuznach Radionar f3.5 / 50mm lens shown here. The side by side viewfinders are just that, viewfinders, no rangefinder. The left one is for 50mm and the right, 75mm.