Thanks to all of you who helped us identify the people and places in our previous photo posts. We have another one for all of you mystery buffs:

What can you tell us about this photo?

The only information we have about this picture is the handwritten “4/70/2” on the back. Is this date accurate? Who is playing on the stage?  Where exactly was this photo taken?

Please leave a comment with any information about the location, performers, crowd, photographer… anything that might give us a clue about this rockin’ concert.