Original 1st printing, 14 x 21 & 7/8" concert poster for Mike Bloomfield, Nick Gravenites, Mark Naftalin, The Byrds and Pacific Gas & Electric at the Fillmore Auditorium in San Francisco, CA on 4/4/1968. 
 
Art by Randy Tuten and Peter Pynchon, image is #159 in the Bill Graham/Fillmore series. 
 
The poster is in excellent condition.  There is just light corner wear and a small crease.  Otherwise nice.