The Concert For Bangla Desh
This disc was auctioned in December 2004.
I have no more info than provided by the auction description.
The designation "1st mix - side 4" is interesting. The songs ultimately ended up as side three of the released version. Perhaps there is something different about he mix.
The auction description doesnt't mention it but the other side of the disc appears to be music from the play titled "The Sign In Sidney Brustein's Window". I have no info on this recording.
See two Apple acetates for sides 5 & 6
here and here
1971. Here is a great Bell Sound Studios acetate of side three of the "Concert For Bangla Desh" LP which includes George Harrison's "While My Guitar Gently Weeps"& "Beware Of Darkness", Ringo Starr's "It Don't Come Easy" and George's introduction of the band. It appears to be the released version. Included is a Bell Sound custom cover. Disc VG.
Recorded live at Madison Square Garden,
New York City 1 August 1971.