Original color 14 x 20 first printing poster for Quicksilver Messenger Service, Other Half, and Melvin Q at the Avalon Ballroom in San Francisco on August 17-20, 1967. Designed by Jack Hatfield, the poster is known as 'High Yo Silver' (FD-76-OP-1). Encapsulated by CGC and assigned a Universal Grade of GEM MINT 10.
