Three Advertisement Posters for a Happening

"The Invisible Circus", a 72 Hour Environmental Community Happening, sponsored by the Diggers Artists Liberation Front Glide Foundation, San Francisco.

14.5 x 20 in.

From a Single-Owner Collection of 1960's San Francisco Psychedelic Concert Posters from the Estate of a California Art Dealer.

Unframed, some creases, staining.

$50 - 150