Original 1st printing 14 x 20" concert poster for Quicksilver Messenger Service appearing with John Hammond & His Screaming Nighthawks and Charles Lloyd at the Avalon Ballroom from 4/21-22/1967. 

 Art by Rick Griffin, image ("Goldrush") is # 58 in the Family Dog/Avalon series. 

 Medium flat index stock poster is in mint/near mint to near mint (A/A- to A-) condition; maybe there's a soft handling ding or two hiding somewhere, but overall it is a pretty clean example of this perennial favorite RG poster from the Avalon.