Original 2nd printing, 14 x 21 & 1/8" concert poster for Traffic, H.P. Lovecraft, Blue Cheer, Mother Earth, and Penny Nichols at the Fillmore Auditorium in San Francisco, CA on 3-14-16/1968. 
 
Art by Lee Conklin, image is #111 in the Bill Graham/Fillmore series. 
 
The poster is in excellent/nm condition.  Just a tiny bit of edgewear.