Original 1st printing 14&1/4 x 21&7/8" concert poster for Sanpaku and Crystal Syphon(e) appearing together at Berryessa Bowl in Napa, CA on 5/31/1969.

 Art by "WEK II", medium-thick flat index stock poster is in good to very good (B to B/B+) condition; there are staple holes/tiny bends/pressure creases in all four corners, along with a 1&1/2" vertical tear in the bottom center margin, a bit of light handling wear, a subtle amount of toning/edge discoloration, a soft horizontal/diagonal bend along the upper left margin, a slight scuff and a tiny stain or two along the right margin and a few stray dings scattered along the outer margin area, otherwise fine.

 Nifty-looking "Captain America"-themed 1969 concert poster from a VERY obscure Northern California venue (does anybody have any memories of this place? I can't find anything...)