San Diego/South Orange 1975 = Oakland '75

[Dark Angel]

I've went over these two concerts this past week, during transferring, and found they are the same concert, but I don't think it's either city listed. At the very end, when the speaker is talking to the audience, he says that Peter Frampton is up next.
I checked the Legacy's comments, and old newsgroup posts, and the only concerts I see where they played on the same stage as Frampton in '75, are the two Oakland concerts, one being "A Day On The Green".
Is it possible that that's what this concert actually is?