Original 1st printing 14 x 20" concert poster for the Chambers Brothers appearing with Iron Butterfly at the Avalon Ballroom in San Francisco, CA from 4/28-29/1967.

 Art by Victor Moscoso, image is # 59 in the Family Dog/Avalon series.

 Medium flat index stock poster is in excellent (B+) condition; there is a semi-soft horizontal/diagonal crease running along the upper right margin, along with a soft diagonal bend in the lower right margin, a couple of semi-soft pinch dings along the left margin and a couple of tiny thin stress creases hiding within the image area, otherwise fine. 

FANTASTIC example of this vibrant 1967 Moscoso image from the Avalon.