Original 1st printing 14&1/4 x 20" concert poster for a George Washington's Birthday-themed show featuring garage-rockers Butch Engle & the Styx appearing with the All-Night Apothecary, Freudian Slips (Friday only) and California Girls (Saturday only) at the Ark in Sausalito, CA from 2/24-25/1967.
 
 Art by W. Yates, medium-thick flat vellum stock poster is in near mint to excellent (A-/B+ to B+) condition; aside from a trio of tiny pin/staple holes in the upper left corner/margin, a stray soft pinch ding or two lurking around the outer margin area and a sliver of edge toning in the lower right margin, it is a VERY sharp example of this amusing early-1967 concert poster from the Ark.