I just bought a near mint Ic (originally sold by 'Fotohaus Kleinholz - Köln Hohe Strasse 112') and all I can find 'wrong' with it is that the underside of the viewing screen assembly needs cleaning. I need to find a very competent (ideally Ikoflex specialist) in the UK who can be trusted to undertake this task as part of a general CLA. Even if I had the confidence to clean the screen myself I would hesitate doing so, from fear of damaging the meter's pointer which looks as though it lies netween the upper screen and a fresnel lens below. I suppose it might well be dirt on the fresnel lens that can be seen as the focusing knob is turned to and fro.
(Assurance that the task is easily accomplished by an expert would be especially welcomed)