Original color first printing 13.75 x 20.75 poster for the Grateful Dead and Miles Davis shows at the Fillmore West in San Francisco on April 9–12, 1970, featuring interesting artwork by David Singer showing an X-ray of a hand holding a nautilus shell. Catalog designation BG-227-OP-1. Archivally double-matted and custom-framed with UV-resistant museum glass to an overall size of 23.5 x 30. In very fine condition. Oversized.