Original 1st printing 11&1/2 x 17&1/2" concert poster for a "Twelve Hour Show" (Labor day weekend dance concert), featuring Quicksilver Messenger Service appearing with Steppenwolf, Black Pearl, Buddy Miles Express, Sons of Champlin, H.P. Lovecraft, Three Dog Night, West and Fraternity of Man at the Sports Arena in Los Angeles, CA on 9/1/1968.
Designer unknown/not credited, medium flat index stock poster is in very good to excellent (B/B+ to B+) condition; a light/subtle degree of toning, a pair of tiny tears in the lower right margin, a few scattered handling/pinch dings and small bends (mostly around the outer edges) and hint of surface wear, otherwise fine.
Very cool-looking little oddball 1968 multi-act show poster from Los Angeles!