too many obituaries in this newsgroup, not enough re-discoveries.
How about 1960s type rock from the Eastern Bloc?
White Hair by the Blue Effect, Czechoslovakia, music done
in 1969, English vocal track dubbed in 1977:
https://www.youtube.com/watch?v=UyYO37Ko_1E
A video of Psychiatricky Prasek by Olympic, Czechoslovakia, 1967:
https://www.youtube.com/watch?v=eprxpGkpEx4
Tobaggan by Olympic, Czechoslovakia, 1971:
https://www.youtube.com/watch?v=vQQ8e0v1aHA
Stapellauf, by Joco-Dev-Sextett, East Germany, 1972:
https://www.youtube.com/watch?v=BYkC0exA7O0