I have one made in Japan. I have never seen one made in Germany even in the Hong Kong second handed market. They used to have 85 1.2,55 1.2,100 2,28 2,85 2.8,85 1.4,60 2.8,15 3.5,25 2.8,all these made in Germany. I have seen 200 2 but it was made in Japan. Nobody has identified any optical difference between lenses made in these two places.
The quality control of Zeiss in Japan is good enough such that even Cosina made Zeiss lenses acquire the optical characteristics of Zeiss,instead of Voigtlander.