Original 1st printing 14&3/8 x 20" concert poster for the Grateful Dead appearing with John Hammond and his Screaming Nighthawks and Robert Baker from 3/24-25/1967 and with Quicksilver Messenger Service on 3/26/1967, all shows held at the Avalon Ballroom in San Francisco, CA.
Art by Rick Griffin, image is # 54 in the Family Dog/Avalon series.
Medium flat index stock poster is in good to very good (B to B/B+) condition; there is a bit of creasing and a few stray tiny edge tears along the left/right margins, a semi-soft horizontal roll bend in the lower portion of the image, a few stray soft bends and a few light handling/pinch dings scattered around the image area, a hint of toning and a set of small pressure creases/bumps in each of the four corners, otherwise fine.
According to a VERY well-researched account, none other than Eric Burdon & the Animals stopped by to play a surprise set on Sunday the 26th- read all about it HERE:
http://lostlivedead.blogspot.com/2010/10/march-26-1967-avalon-ballroom-san.html