Yes I have been on that site, no info on the Kristall 1, just the later model.
Thanks
dave.
They'll likely be fairly similar although the one you have looks like a simple scale focus camera as theres no rangefinder like with the R model linked. What sort of information do you actually want? It looks to me like it takes L39 screw fit lenses (the old Leica screw mount) and is just a simple manual scale finder camera.
The only reference i can find to it my books is that the your model was from 1955 and came with a Elionar 5cm lens with an aperature of F3.5.
Hope this might help you