Here's one for the grey bearded folks out there . I have gotten an Eho Box-180 Linse camera to work specifically this one: EHO-Box 180 "Linse" Manufactured by Altissa before they were called Altissa (before even the war). The question is now how do I use it? The camera takes 120 film, has a fixed shutter and fixed aperture. Well doesn't have an aperture at all really it has a rear meniscus lens. Everything seems to be in working condition, but I have no clue about what kind of film speed this thing expects. Now I will assume it was made for taking photos outside. Altissa wasn't exactly a high end manufacturer, trying to sell cheap box cameras to the people. Even if you don't know anything about this exact camera, can anyone point me to what kind of film speeds, shutter speeds, apertures or any other useful information exists about using cameras made in the 1930s? I really wouldn't mind putting a roll of film though this.