SIX PSYCHEDELIC POSTERS including RICK GRIFFIN (American, 1944-1991), two "Joint Show, a Rare Blend," 1967, printed signature and date lower right, First Edition 1200, AOR-2.347; STANLEY MOUSE (American, b. 1940), two "Moore Galleries Presents: Kelley, Stanely Mouse, Vic Moscoso, Wes Wilson, and Rick Griffin," 1967, First Edition 1200, Reproductions by Mouse Studios; and DAVID SINGER (American, 20th Century), two "The Rolling Stones, Winterland," Bill Graham, 1972, printed signature lower right, Copyright Bill Graham 1972 #289, Tea Lautrec Litho, San Francisco, second print, BG-289; (approximate dimensions - sheet (each): 28 x 22 inches). Provenance: Union Square Graphics Company, San Francisco CA; kept by the owners after closing store. Condition: Both Winterland has minor foxing verso and minor stained on left side, one has a scratch on top left corner. Overall, all have handling marks and are in good condition.