The transistorised one was the MK2, known as the 'Lernkit'.
Forum member Chris55000 kindly posted the first five parts of the manual at post #6 in the thread here:
https://www.vintage-radio.net/forum/...d.php?t=179656
This might also be of passing interest concerning the MK1 valved version:
https://www.youtube.com/watch?v=HzhJKE9vzMM
Hope that helps.