Original 1st printing 14&1/4 x 19&7/8" concert poster for the Grateful Dead appearing with Moby Grape and the Steve Miller Blues Band at the Avalon Ballroom in San Francisco, CA on 12/23-24/1966. Art by Victor Moscoso, image is # 40 in the Family Dog/Avalon series. Medium-thick flat vellum stock poster is in absolutely sparkling mint/near mint to near mint (A/A- to A-) condition; just the slightest touch of handling, otherwise it is just as bright/crisp an example of this festive holiday-inspired Grateful Dead image as you can ho-ho-hope to find. 'Tis the season, have a Jerry Christmas and Happy New Weir.