Original 1st printing 19&7/8" x 29&7/8" 1967 silver foil poster, "SEX!", by the one and only Martin Sharp.
Poster is #BO2 in the Big O Posters series.
Thick foil-coated index stock poster is in decent/used (B/B-) condition; there are a number of tiny edge creases/nicks/nip tears around the outer margin area, a moderate amount of surface wear (a bit of tightening of the foil/"worming" throughout the image area), a series of tiny thin stress bends and a few semi-pronounced horizontal bends along the right margin, otherwise fine.
Early (and somewhat controversial) image from the Big O series, check out an extensive chronological list of Martin Sharp's posters HERE:
http://sharpposters.blogspot.com.au/