I think what everybody overlooks is the amazing resiliency of the original Contax II design. The Kiev cameras work quite well and when you understand the admittedly low quality of assembly and the many changes done to simplify and cheapen assembly, I have to believe the Contax design is actually very good. Again, I kind of suspect the Leica publicity machine when the claims are made of all the twists and turns that were required by Zeiss Ikon in order to avoid the Leica patents and to build another quality 35mm camera. I think the truth of the matter is that there are many ways to achieve the same goal, and the first one out the gate does not necessarily patent all the correct ones.
The Contax design is not all that tough to understand. It works and it works very well whether it was built in Germany or in Ukraine. The Contax had many advanced and successful features that Leica worked hard to match with their M3 camera. Zeiss Ikon went out of business in the West for many reasons that had nothing to do with the strength of their designs and the quality build of their cameras.
Of course all of this applies to the Contax. Somehow I'm not all that sure that the Contarex was that reliable, though it was an amazing camera with great glass.
Well the Conterax did not sell in volume like the Nikon F
Leitz stayed a cottage industry. Canon & Nikon went
large.
ContaxII were well complicated designed with too many parts.
KISS Keep it Simple and Stupid...