Hi I do have data for the KCR 40 and I can confirm it is a Y R B camera matrixed to the usual Y, RGB output. The Frenseh, Bosch, BTS camera line is a long and distinguished one. It would need some research to determine which was the last German camera but, for instance, the KCP60 studio camera is later.
I will,in due course, do the Bosch pages of my website. There is a lot to do and time is the problem.
I do have a KCR40 in the museums collection, it is missing a small viewfinder and the blue top cover over the scan coil, if you happen to find those I would be very happy.... attached are a few notes, please regard them as a private draft and not to be relied on.
have a look at Michaels site
http://www.xs4all.nl/~vdsmeede/fernseh/home_uk.html for a nice KCR40.
Regards Brian
www.tvcameramuseum.org