Original 1st printing 8&1/2 x 11" concert flyer for the Grateful ("Greatful") Dead appearing with Sopwith Camel at the Avalon Ballroom in San Francisco, CA on 8/19-20/1966. Art by Alton Kelley and Stanley Mouse (who also SIGNED the flyer in pencil), image is # 22 in the Family Dog/Avalon series. Thin flat stock flyer is in absolutely sparkling mint/near mint (A/A- to A-) condition; an ultra-crispy/bright SIGNED example of this early 1st printing GD/Mouse/Kelley Avalon image. This was reportedly the weekend that Warner Brothers' Joe Smith signed the Dead to their recording contract.