Original 1st printing 14&1/2 x 21&3/4" concert poster for Quicksilver Messenger Service appearing with the Siegal-Schwall Blues Band an the Phoenix at the Avalon Ballroom in San Francisco, CA on 7/4/1967.
Art by Rick Griffin, image ("Independance") is # 69 in the Family Dog/Avalon series.
Medium flat index stock poster is in superb near mint (A-/B+ to B+) condition; aside from a 1" area of diagonal creasing in the bottom left corner tip, a tiny pinch bend in the top left corner tip, a couple of tiny edge dings and a whisper of toning, this example looks just as fresh as the day it rolled off the press in 1967.
CLASSIC '67 Griffin image from the Avalon.