Original 1st printing, Tues/Wed, Friday x2 and Saturday concert tickets for Big Brother & the Holding Company with Janis Joplin, Jeff Beck, Sly & the Family Stone, Richie Havens, Siegal Schwall, and Illinois Speed Press at the Fillmore Auditorium in San Francisco, CA on 4/4/1968. One ticket has a stamp for the Grateful Dead show on the back.
 
Art by Lee Conkiln, image is #129 in the Bill Graham/Fillmore series. 
 
The tickets are in excellent/nm condition.