http://www.progarchives.com/album.asp?id=15935
Klaus Schulze's
Berlin 1 isn't really an official Klaus Schulze album.
It's actually a sampler cassette, released in a quick and sporadic cover in
1986 (so not
1976, the year of the live recording!!), sold out and left as a bootleg or, best, as a cassette or "lone track" release.
Furthermore, the piece within this album was re-released, in a longer version, in one of the bonus CDs from
The Ultimate Edition. Since that is an official box release, I think the sampler cassette shouldn't have an entry of itself.
http://www.progarchives.com/album.asp?id=10325
I realize that philippe already put a good word for it, it's undeniable that this is a good to be affirmed Klaus Schulze music record, but the circumstances (cassette release; music already available on a more official box release) would comply that
Berlin 1 shouldn't be a separate album in Klaus Schulze's page.