I remember my father buying a Werra camera for my eledest brother, this would have been well over 50 years ago. My father was a fan of Tessar lenses and I think it came with a Tessar lens. I don't think the camera ever worked properly. I seem to rember the problem was with the film advance which I think was made with the rubber coated ring on the lens. I would be intersted to know if your copy of the camera works. Regards, Paul