@longexposure It is a Kiev 4 rangefinder. Unfortunately it ha a ding in the side making it pretty useless as it is full of light leaks. So I have sent it back. It is based on a Contax design from the 1930's. Of course there is a big difference in price. Quite difficult to use as you have to adopt a strange hold. However my curiosity has been quenched. Now I am considering a Pentacon Six....... just have to save up (and sell some cameras).