Original 1st printing 8&1/2 x 11" concert flyer for the Youngbloods appearing with the Sons of Champlin and Sparrow at the Avalon Ballroom in San Francisco, CA from 12/16-17/1966.
 
 Art by Stanley Mouse and Alton Kelley, image is # 39 in the Family Dog/Avalon series. *this is a three-color (red/yellow/black) test proof- no blue pass of ink
 
 Thin flat stock flyer is in good (B) condition; there are flattened horizontal/vertical creases (item was folded into 1/6ths and pressed out), plus a light amount of handling wear, tiny staple holes in all four corners, a soft diagonal crease in the lower right margin and a hint of edge/corner-tip creasing/wear, otherwise fine.

 Very cool oddball variant version of this late-'66 Mouse/Kelley Avalon concert flyer.