I used to have an Akarelle rangefinder with a 50/2.8 Schneider-Kreuznach and I believe I had a 35mm Schneider for it, too. There were two lenses but I only had it for a short time as it was stolen from me back in '97. I didn't even get to shoot with it. Anyway, as dirbel mentioned, it does not have a Leica thread mount. The mount was unique so lenses are probably difficult to find for this particular model. The mount involves a rotating collar on the lens that mates with the male thread on the camera body. There's also a pin on either the lens or the camera that mates with a slot (on the lens or the camera),... it's really a simple system, I'm just not good at explaining these kinds of things. Especially since I haven't seen it in ten years.