Original 1st printing 11&1/4 x 20&1/2" concert poster for Quicksilver Messenger Service appearing with the Charlatans and Congress of Wonders at the Avalon Ballroom in San Francisco, CA from 12/15-17/1967.

 Art by (and SIGNED in pencil (in 1972) by) Stanley Mouse and Alton Kelley, image ("Dance") is # 96 in the Family Dog/Avalon series.

 Medium flat index stock poster is in very good to excellent (B/B+ to B+) condition; there are tack holes with a couple of tiny wedge tears in the corner tips, along with a bit of mild creasing in the lower left corner, a whisper of handling wear and a couple of stray pressure creases scattered around the outer margin area, otherwise fine.

 While the poster itself isn't all that scarce, this example has an INCREDIBLE pair of early-'70's Mouse/Kelley signatures.