Question about Zurich'79

After so much early shows who where shared here i'd like to share another great Jazz Tour gig.
According to Bob's great site queenlive.ca, a lower generation tape of the Zurich'79 Show does exist. (It's Late on a compilation Bootleg)
I have the "common" version which appears at several collector sites. Is it known that a lower gen. tape circulates among collectors?
Thanks for your Help :-)

Hard to tell.. It is right that a version with at least VG+ quality appears on a bootleg release, but unfortunately only It's Late. I have never heard the ''complete'' recording with the same quality. The master recording would be great and I hope it's still out there and not wasted. maybe some other people know more about this??