Original 1st printing 13&1/2 x 18&1/8" event/concert poster for "Fluxfest", a multi-act show/happening held at Longshoreman's Hall in San Francisco, CA on 3/31/1967. 

 Poster lists performances/appearances by Quicksilver Messenger Service, the Wildflower, the San Francisco Mime Troupe and more.

 Art by Ida Griffin, medium flat index stock poster is in excellent (B+) condition; just a light amount of handling wear and a couple of soft stains on the reverse that just start to bleed through the paper slightly along the upper right margin and just to the left of "films", otherwise it is a mostly-clean example of this semi-obscure 1967 SF event poster.