Remember
this?
Now go listen to the 26 Feb 77 Rumours Rehearsal recording, at the end of Say You Love Me/beginning of GYOW (around 4:25 into SYLM on my CD). Stevie sounds more amused than anything through this.
Christine: Go Your Own Way? *pause* Thank you, good evening. *burbles*
Stevie: Am I.. playing on Go Your Own Way?
Christine: Such a...
Lindsey?: No.
Christine: ... pleasure to be here in Berkley this evening...
Stevie: I'm not?... I'm not?
Christine: This is our first gig for about nine months.
Stevie: *inaudible*... my guitar get(got?) taken away.
male voice: *inaudible*
Stevie: You mean...
Christine: Could I have another Perrier water please?
Stevie: You mean my debut is not debuting?.... Raymond, are you playing on this song?
So. *My* best guess on the mystery picture is it's GYOW at a Rumours rehearsal prior to 26 Feb 77.