Original 1st printing (blue background, no "W") 14&1/8 x 21" concert poster for Jefferson Airplane and the Grateful Dead appearing with Afro-Cuban jazz legend Mongo Santamaria at Winterland from 5/2-3/1969 and Mongo Santamaria headlining over Cold Blood and the Elvin Bishop Group at the Fillmore West (all in San Francisco, CA) on 5/1 & 5/4/1969.
Art by Randy Tuten, image is # 171 in the Bill Graham/Fillmore series.
Medium glossy-coated index stock poster is in GORGEOUS near mint (A-) condition; just a couple of very soft handling creases in the left center margin and a stray fingerprint/thin surface scratch or two here and there, otherwise it is an UNBEATABLE 1st printing example of this classic 1969 JA/GD image from the Bill Graham series.