Original 1st printing 13&3/4 x 19&7/8" concert poster for the Youngbloods appearing with the Sparrow (an early precursor to Steppenwolf) and the Sons of Champlin 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.

 Medium-thick flat vellum stock poster is in very good (B/B+) condition; there is a relatively minor amount of corner/edge creasing around the outer margin area, along with a few thin stress bends/handling dings and light fingerprint smudges hiding within the image area, a couple of slightly rounded corner tips and a series of tape marks going around the outer margin area on the reverse (which also has a moderate amount of toning), otherwise fine.

 Nice-looking gently-used example of this classic late-'66 Mouse/Kelley poster from the Avalon.