I got this 8x10 glossy at the postcard show last month. On the back is the name and address of Jim Marshall. Jim was a very famous photographer in San Francisco. He documented all the bands and musicians during the 60's and 70's, mostly in the Bay Area.. He died recently, in March of this year. I have no idea how this picture ended up with that seller. I think this was the only one. I didn't know he was so famous when I bought it, but I am not surprised.
I really like this image because I always love seeing the crowds in the shots from those 60's concerts. The title on the back is "Kids in Golden Gate Park".