Years ago, when Kyocera (Yashica) purchased the Contax rights and made lenses in the Contax/Yashica mount, all the photo magazines were relating that the T* were made in Japan (or at least in the Far East), and the non-T* were made in Germany. Your information may be correct, but I never heard that.
In any case that may not apply to the question above since it seems to refer to other than SLR lenses. My bad.