Original black-and-yellow 8.5 x 11 handbill for the Grateful Dead (misspelled "Greatful Dead") at San Francisco's Avalon Ballroom on August 19-20, 1966, supported by Sopwith Camel. Designed by Alton Kelley and Stanley Mouse, and printed by the Bindweed Press. Signed in black felt tip by Stanley Mouse. In fine condition.