1967 Wes Wilson Exhibition of Psychedelic Posters. Poster has been displayed before so there are pin holes in each of the corners along tape residue on the backside. Please zoom in on the pictures to view the actual condition of the poster. 13 x 18.25 Inches. This original 1967 poster designed by the late, great Wes Wilson, and was produced to advertise the ground breaking Exhibition of Psychedelic Posters for the University Art Museum at the University of California Berkeley. Wes Wilson’s recent passing resulted in appreciative headlines around the world. Wilson is unquestionably the inventor of the classic psychedelic lettering and aesthetic and this poster is a wonderful commemorative of his achievements. Out of production for over 55 years!