MOBY GRAPE Avalon Ballroom San Francisco Concert Postcard (1967 US promotional-only 5" x 7 & 1/2" postcard for the August 10-13, 1967 concerts at the Avalon Ballroom, San Francisco, which featured Moby Grape, Canned Heat, Vanilla Fudge & NorthAmerican Ibis Alchemical Co.)