Original first printing 12 & 11/16 x 20 & 5/8" concert poster for "A Tribue to Chet Helms" featuring: Steve Miller, Creedence Clearwater Revival, Gregg Allman, Big Brothers and the Holding Company, New Riders of the Purple Sage, Dan Hicks, Lee Michaels, Chris Solberg, Country Joe, Squid Vicious Orchestra, Peter Tork of the Monkees, Terry Dolan, Berry Melton and The Dinosaurs, members of Jefferson Starship, Quicksilver Messenger Service and the Doobie Brothers, Doug Sahm, Sir Douglas Quintet, Harvey Mandel, Mitchel Holman, Howard Wales, Jerry Miller and Peter Lewis of Moby Grapes, members of the Seeds, Caribbean Allstars, Bill Ham, Lenny Williams, Peter Coyote, Ken Kesey and Wavy Gravey.
 
Art by Jim Phillips.
 
The poster is on glossy stock.  Excellent/nm condition.